Help me with that errors

31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.ThreadServerApplication.run(SourceFile:849)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.MinecraftServer.run(MinecraftServer.java:427)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.MinecraftServer.q(MinecraftServer.java:494)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.DedicatedServer.r(DedicatedServer.java:224)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.MinecraftServer.r(MinecraftServer.java:598)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.DedicatedServerConnection.b(SourceFile:29)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.DedicatedServerConnectionThread.a(DedicatedServerConnectionThread.java:44)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.PendingConnection.c(PendingConnection.java:45)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.PendingConnection.d(PendingConnection.java:130)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.PlayerList.a(PlayerList.java:95)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.PlayerList.c(PlayerList.java:171)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.PlayerList.a(PlayerList.java:126)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.PlayerChunkMap.addPlayer(PlayerChunkMap.java:113)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.PlayerChunkMap.a(PlayerChunkMap.java:70)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.PlayerChunk.<init>(PlayerChunk.java:24)
31.01 15:59:37 [Server] WARNING [Server] at net.timedminecraft.server.TimedChunkProviderServer.getChunkAt(TimedChunkProviderServer.java:153)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:99)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.ChunkRegionLoader.chunkExists(ChunkRegionLoader.java:39)
31.01 15:59:37 [Server] WARNING [Server] at net.minecraft.server.v1_4_6.RegionFile.chunkExists(RegionFile.java:109)
31.01 15:59:37 [Server] WARNING [Server] at java.io.RandomAccessFile.readInt(Unknown Source)
31.01 15:59:37 [Server] WARNING [Server] at java.io.RandomAccessFile.read(Native Method)
31.01 15:59:37 [Server] WARNING [Server] What follows is the stack trace of the main thread
31.01 15:59:37 [Server] WARNING [Server] The main thread failed to respond after 10 seconds
31.01 15:59:22 [Server] WARNING Can't keep up! Did the system time change, or is the server overloaded?
31.01 15:59:01 [Server] INFO Connection reset
31.01 15:59:01 [Server] WARNING Can't keep up! Did the system time change, or is the server overloaded?

 

Please post your startup log (server.log)