When i open server, i get Cant reach server

I am on a macbook pro version 10.6.8.
Is there anything wrong with my server startup that explains the problem?
Last login: Wed Jun 19 16:23:11 on ttys000
/Users/Thegrissomfamily/Desktop/Warriors\ Server/start.command ; exit;
Jonathan-Grissoms-MacBook-Pro:~ Thegrissomfamily$ /Users/Thegrissomfamily/Desktop/Warriors\ Server/start.command ; exit;
229 recipes
27 achievements
16:24:57 [INFO] Starting minecraft server version 1.5.2
16:24:57 [INFO] Loading properties
16:24:57 [INFO] Default game type: SURVIVAL
16:24:57 [INFO] Generating keypair
16:24:57 [INFO] Starting Minecraft server on *:62543
16:24:58 [INFO] This server is running CraftBukkit version git-Bukkit-1.5.2-R1.0-1-gf46bd58-b2790jnks (MC: 1.5.2) (Implementing API version 1.5.2-R1.1-SNAPSHOT)
16:24:58 [SEVERE] Could not load 'plugins/Groups_v1.1.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: com/gmail/Lecrayen/Platinum/Groups : Unsupported major.minor version 51.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:184)
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305)
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230)
at org.bukkit.craftbukkit.v1_5_R3.CraftServer.loadPlugins(CraftServer.java:239)
at org.bukkit.craftbukkit.v1_5_R3.CraftServer.<init>(CraftServer.java:217)
at net.minecraft.server.v1_5_R3.PlayerList.<init>(PlayerList.java:55)
at net.minecraft.server.v1_5_R3.DedicatedPlayerList.<init>(SourceFile:11)
at net.minecraft.server.v1_5_R3.DedicatedServer.init(DedicatedServer.java:106)
at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:382)
at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.UnsupportedClassVersionError: com/gmail/Lecrayen/Platinum/Groups : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:80)
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:249)
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:173)
... 9 more
16:24:58 [INFO] [PermissionsEx] sql backend registered!
16:24:58 [INFO] [PermissionsEx] file backend registered!
16:24:58 [INFO] [PermissionsEx] PermissionEx plugin initialized.
16:24:58 [INFO] [GroupManager] Loading GroupManager v2.0 (2.10.1) (Phoenix)
16:24:58 [INFO] [WorldEdit] Loading WorldEdit v5.5.6
16:24:58 [INFO] [DisguiseCraft] Loading DisguiseCraft v4.8
16:24:59 [INFO] [MobspawnSettings] Loading MobspawnSettings v1.6
16:24:59 [INFO] [Modifyworld] Loading Modifyworld v1.19.6
16:24:59 [INFO] [PermissionsEx] Loading PermissionsEx v1.19.6
16:24:59 [INFO] [PermissionsEx] Initializing file backend
16:24:59 [INFO] Permissions file successfully reloaded
16:24:59 [INFO] [Essentials] Loading Essentials v2.10.1
16:24:59 [INFO] [ChatManager] Loading ChatManager v1.19.1
16:24:59 [INFO] [EssentialsProtect] Loading EssentialsProtect v2.10.1
16:24:59 [INFO] MLog clients using java 1.4+ standard logging.
16:24:59 [INFO] [EssentialsSpawn] Loading EssentialsSpawn v2.10.1
16:24:59 [INFO] [EssentialsChat] Loading EssentialsChat v2.10.1
16:24:59 [INFO] [ColorMe] Loading ColorMe v3.8.1
16:24:59 [INFO] [EssentialsAntiBuild] Loading EssentialsAntiBuild v2.10.1
16:24:59 [INFO] Preparing level "world"
16:24:59 [INFO] Preparing start region for level 0 (Seed: 744228495)
16:25:00 [INFO] Preparing start region for level 1 (Seed: -3692508830364763475)
16:25:00 [INFO] Preparing spawn area: 45%
16:25:00 [INFO] ----- Bukkit Auto Updater -----
16:25:00 [INFO] It appears that you're running a Development Build, when you've specified in bukkit.yml that you prefer to run Recommended Builds.
16:25:00 [INFO] If you would like to be kept informed about new Development Build releases, it is recommended that you change 'preferred-channel' in your bukkit.yml to 'dev'.
16:25:00 [INFO] With that set, you will be told whenever a new version is available for download, so that you can always keep up to date and secure with the latest fixes.
16:25:00 [INFO] If you would like to disable this warning, simply set 'suggest-channels' to false in bukkit.yml.
16:25:00 [INFO] ----- ------------------- -----
16:25:00 [INFO] Preparing start region for level 2 (Seed: -3692508830364763475)
16:25:01 [INFO] [GroupManager] Enabling GroupManager v2.0 (2.10.1) (Phoenix)
16:25:01 [INFO] GroupManager - INFO - World Found: tardis
16:25:01 [INFO] GroupManager - INFO - World Found: world
16:25:01 [INFO] GroupManager - INFO - Superperms support enabled.
16:25:01 [INFO] GroupManager - INFO - Scheduled Data Saving is set for every 10 minutes!
16:25:01 [INFO] GroupManager - INFO - Backups will be retained for 24 hours!
16:25:01 [INFO] GroupManager version 2.0 (2.10.1) (Phoenix) is enabled!
16:25:01 [INFO] [WorldEdit] Enabling WorldEdit v5.5.6
16:25:01 [INFO] WEPIF: GroupManager detected! Using GroupManager for permissions.
16:25:01 [INFO] [DisguiseCraft] Enabling DisguiseCraft v4.8
16:25:01 [WARNING] [DisguiseCraft] You have "disguisePVP" enabled in the configuration, but do not have the ProtocolLib plugin installed! Players wearing disguises can not be attacked by melee!
16:25:01 [INFO] [DisguiseCraft] Version 4.8 is enabled!
16:25:01 [INFO] [MobspawnSettings] Enabling MobspawnSettings v1.6
16:25:01 [INFO] [MobspawnSettings] MobspawnSettings enabled
16:25:01 [INFO] [Modifyworld] Enabling Modifyworld v1.19.6
16:25:01 [INFO] [Modifyworld] Modifyworld enabled!
16:25:01 [INFO] [PermissionsEx] Enabling PermissionsEx v1.19.6
16:25:01 [INFO] [PermissionsEx] Superperms support enabled.
16:25:01 [INFO] [PermissionsEx] v1.19.6 enabled
16:25:01 [INFO] WEPIF: PermissionsEx detected! Using PermissionsEx for permissions.
16:25:01 [INFO] [Essentials] Enabling Essentials v2.10.1
16:25:02 [INFO] Essentials: Using PermissionsEx based permissions.
16:25:02 [INFO] [ChatManager] Enabling ChatManager v1.19.1
16:25:02 [INFO] [ChatManager] ChatManager disabled. Check config.yml!
16:25:02 [INFO] [ChatManager] Disabling ChatManager v1.19.1
16:25:02 [INFO] [ChatManager] ChatManager disabled!
16:25:02 [INFO] [EssentialsProtect] Enabling EssentialsProtect v2.10.1
16:25:03 [INFO] Initializing c3p0-0.9.1.2 [built 21-May-2007 15:04:56; debug? true; trace: 10]
16:25:03 [INFO] [EssentialsSpawn] Enabling EssentialsSpawn v2.10.1
16:25:03 [INFO] [EssentialsChat] Enabling EssentialsChat v2.10.1
16:25:03 [INFO] [ColorMe] Enabling ColorMe v3.8.1
16:25:03 [INFO] [ColorMe] Vault was not found! Running without economy!
16:25:03 [INFO] [ColorMe] Running without Spout!
16:25:03 [INFO] [ColorMe] Using own group system!
16:25:03 [INFO] [ColorMe] SoftMode enabled. If other chat plugins are found, the chat won't be affected by ColorMe.
16:25:03 [INFO] [ColorMe] Found ChatManager. Will use it for chat!
16:25:03 [INFO] [ColorMe] Didn't found TagAPI!
16:25:04 [INFO] [EssentialsAntiBuild] Enabling EssentialsAntiBuild v2.10.1
16:25:04 [INFO] Server permissions file permissions.yml is empty, ignoring it
16:25:04 [INFO] Done (5.788s)! For help, type "help" or "?"
16:25:05 [INFO] GroupManager - INFO - Bukkit Permissions Updated!
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Rigjuce are you connecting to the server on the right port? You have your server set to port 62543.

Also, try removing the groups plugin that is causing the errors and try again

 

I agree with /\
|
you probably need to connect to "your ip here":62543 without quotes or change your server's port to 25565, the default minecraft server port.

 

Upgrade your current Java Version.

Also try connecting with "localhost:62543"