I can break blocks, but i can't place them!

I started my bukkit server not too long ago, and the title explains it all! No, i'm not meaning that i can't break blocks. I can't place them!
Here is my most recent server log:

Code:

2013-03-02 15:46:15 [INFO] Starting minecraft server version 1.4.7
2013-03-02 15:46:15 [INFO] Loading properties
2013-03-02 15:46:15 [INFO] Default game type: CREATIVE
2013-03-02 15:46:15 [INFO] Generating keypair
2013-03-02 15:46:16 [INFO] Starting Minecraft server on *:25565
2013-03-02 15:46:16 [INFO] This server is running CraftBukkit version git-Bukkit-1.4.7-R1.0-b2624jnks (MC: 1.4.7) (Implementing API version 1.4.7-R1.0)
2013-03-02 15:46:16 [INFO] [MantaMobControl] Loading MantaMobControl v1.2
2013-03-02 15:46:16 [INFO] [Vault] Loading Vault v1.2.24-b304
2013-03-02 15:46:16 [INFO] [Multiverse-Core] Loading Multiverse-Core v2.4-b527
2013-03-02 15:46:16 [INFO] [PluginManager] Loading PluginManager v1.0.2
2013-03-02 15:46:16 [INFO] [Essentials] Loading Essentials v2.10.1
2013-03-02 15:46:16 [INFO] [EssentialsChat] Loading EssentialsChat v2.10.1
2013-03-02 15:46:16 [INFO] [EssentialsProtect] Loading EssentialsProtect v2.10.1
2013-03-02 15:46:16 [INFO] MLog clients using java 1.4+ standard logging.
2013-03-02 15:46:16 [INFO] [EssentialsSpawn] Loading EssentialsSpawn v2.10.1
2013-03-02 15:46:16 [INFO] [EssentialsAntiBuild] Loading EssentialsAntiBuild v2.10.1
2013-03-02 15:46:16 [INFO] [Vault] Enabling Vault v1.2.24-b304
2013-03-02 15:46:16 [INFO] [Vault][Economy] Essentials Economy found: Waiting
2013-03-02 15:46:17 [INFO] [Vault][Permission] SuperPermissions loaded as backup permission system.
2013-03-02 15:46:17 [INFO] [Vault] Enabled Version 1.2.24-b304
2013-03-02 15:46:17 [INFO] [Vault][Economy] Essentials Economy hooked.
2013-03-02 15:46:17 [INFO] Preparing level "world"
2013-03-02 15:46:17 [INFO] Preparing start region for level 0 (Seed: 2684794406985437860)
2013-03-02 15:46:18 [INFO] Preparing spawn area: 85%
2013-03-02 15:46:18 [INFO] Preparing start region for level 1 (Seed: 2684794406985437860)
2013-03-02 15:46:19 [INFO] Preparing start region for level 2 (Seed: 2684794406985437860)
2013-03-02 15:46:19 [INFO] Preparing spawn area: 52%
2013-03-02 15:46:19 [INFO] [MantaMobControl] Enabling MantaMobControl v1.2
2013-03-02 15:46:19 [INFO] MantaMobControl  version 1.2 is enabled!
2013-03-02 15:46:19 [INFO] ##############################
2013-03-02 15:46:19 [INFO] MantaMobControl: Pigs Enabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Cows Enabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Chickens Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Mooshrooms Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Sheep Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Sheep Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Villagers Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Enderman Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: s Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Pigmen Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Blaze Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Cave Spider Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Creeper Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Ghast Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Magma Cube Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Silverfish Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Skeleton Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Slimes Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Spiders Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Zombies Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Ender Dragons Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Snow Golems Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Giants Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Ocelots Disabled
2013-03-02 15:46:19 [INFO] MantaMobControl: Iron Golems Disabled
2013-03-02 15:46:19 [INFO] ##############################
2013-03-02 15:46:19 [INFO] MantaMobControl: DESPAWNING ALL DISABLED MOBS. THIS CAN BE TURNED OFF IN MobControlProperties.txt
2013-03-02 15:46:19 [INFO] [Multiverse-Core] Enabling Multiverse-Core v2.4-b527
2013-03-02 15:46:19 [INFO] [Multiverse-Core] - Version 2.4-b527 (API v14) Enabled - By Rigby, fernferret, lithium3141 and main--
2013-03-02 15:46:19 [INFO] [AllPay] - Version 10.0 - hooked into Essentials Economy for Multiverse-Core v2.4-b527
2013-03-02 15:46:19 [INFO] [Multiverse-Core] Loading World & Settings - 'world' - Env: NORMAL - Type: NORMAL & seed: 2684794406985437860
2013-03-02 15:46:19 [INFO] [Multiverse-Core] Loading World & Settings - 'world_nether' - Env: NETHER - Type: NORMAL & seed: 2684794406985437860
2013-03-02 15:46:19 [WARNING] [Multiverse-Core] Spawn location from world.dat file was unsafe. Adjusting...
2013-03-02 15:46:19 [WARNING] [Multiverse-Core] Original Location: X: 0 Y: 64 Z: 0 P: 0 Y: 0
2013-03-02 15:46:19 [SEVERE] [Multiverse-Core] New safe spawn NOT found!!!
2013-03-02 15:46:19 [INFO] [Multiverse-Core] Loading World & Settings - 'world_the_end' - Env: THE_END - Type: NORMAL & seed: 2684794406985437860
2013-03-02 15:46:20 [INFO] [Multiverse-Core] Loading World & Settings - 'robbies-plot' - Env: NORMAL - Type: FLAT & seed: -7333643552384833157
2013-03-02 15:46:20 [INFO] Preparing start region for level 3 (Seed: -7333643552384833157)
2013-03-02 15:46:21 [INFO] Preparing spawn area for robbies-plot, 81%
2013-03-02 15:46:21 [INFO] [Multiverse-Core] Loading World & Settings - 's' - Env: NORMAL - Type: NORMAL & seed: 2425630476527003527
2013-03-02 15:46:21 [INFO] Preparing start region for level 4 (Seed: 2425630476527003527)
2013-03-02 15:46:21 [INFO] [Multiverse-Core] 5 - World(s) loaded.
2013-03-02 15:46:21 [INFO] [PluginManager] Enabling PluginManager v1.0.2
2013-03-02 15:46:21 [INFO] [Essentials] Enabling Essentials v2.10.1
2013-03-02 15:46:22 [INFO] Essentials: Using config file enhanced permissions.
2013-03-02 15:46:22 [INFO] Permissions listed in as player-commands will be given to all users.
2013-03-02 15:46:22 [INFO] [EssentialsChat] Enabling EssentialsChat v2.10.1
2013-03-02 15:46:22 [INFO] [EssentialsProtect] Enabling EssentialsProtect v2.10.1
2013-03-02 15:46:22 [INFO] Initializing c3p0-0.9.1.2 [built 21-May-2007 15:04:56; debug? true; trace: 10]
2013-03-02 15:46:22 [INFO] [EssentialsSpawn] Enabling EssentialsSpawn v2.10.1
2013-03-02 15:46:22 [INFO] [EssentialsAntiBuild] Enabling EssentialsAntiBuild v2.10.1
2013-03-02 15:46:22 [INFO] Server permissions file permissions.yml is empty, ignoring it
2013-03-02 15:46:22 [INFO] Done (5.716s)! For help, type "help" or "?"
2013-03-02 15:46:25 [INFO] /127.0.0.1:3078 lost connection
2013-03-02 15:46:28 [INFO] robbie0630[/127.0.0.1:3081] logged in with entity id 668 at ([world] 75.30000001192093, 72.9490540768573, 172.30000001192093)
2013-03-02 15:46:40 [INFO] CONSOLE: Stopping the server..
2013-03-02 15:46:40 [INFO] Stopping server
2013-03-02 15:46:40 [INFO] [EssentialsAntiBuild] Disabling EssentialsAntiBuild v2.10.1
2013-03-02 15:46:40 [INFO] [EssentialsSpawn] Disabling EssentialsSpawn v2.10.1
2013-03-02 15:46:40 [INFO] [EssentialsProtect] Disabling EssentialsProtect v2.10.1
2013-03-02 15:46:41 [INFO] [EssentialsChat] Disabling EssentialsChat v2.10.1
2013-03-02 15:46:41 [INFO] [Essentials] Disabling Essentials v2.10.1
2013-03-02 15:46:41 [INFO] [Vault][Economy] Essentials Economy unhooked.
2013-03-02 15:46:41 [INFO] [PluginManager] Disabling PluginManager v1.0.2
2013-03-02 15:46:41 [INFO] [Multiverse-Core] Disabling Multiverse-Core v2.4-b527
2013-03-02 15:46:41 [INFO] [Multiverse-Core] - Disabled
2013-03-02 15:46:41 [INFO] [Vault] Disabling Vault v1.2.24-b304
2013-03-02 15:46:41 [INFO] [MantaMobControl] Disabling MantaMobControl v1.2
2013-03-02 15:46:41 [INFO] MantaMobControl is now Disabled!
2013-03-02 15:46:41 [INFO] Saving players
2013-03-02 15:46:41 [WARNING] DSCT: socket closed
2013-03-02 15:46:41 [INFO] Closing listening thread
2013-03-02 15:46:41 [INFO] Saving worlds
2013-03-02 15:46:41 [INFO] Saving chunks for level 'world'/Overworld
2013-03-02 15:46:46 [INFO] Saving chunks for level 'world_nether'/Nether
2013-03-02 15:46:46 [INFO] Saving chunks for level 'world_the_end'/The End
2013-03-02 15:46:46 [INFO] Saving chunks for level 'robbies-plot'/Overworld
2013-03-02 15:46:46 [INFO] Saving chunks for level 's'/Overworld

My plugins are:

• All essentials plugins
• Multiverse-Core
• MantaMobControl
• PluginManager
• Vault

They're all up to date.
What should i do?

 

Try removing Essentials Anti Build

 

Are you op?

 

add essentials.build.* to your group in the server