Everytime i try to get onto my modded forge server i get "Internal server error". Whats going on?

It works perfectly fine in singleplayer. I also have the same exact mods in the server and my client.

 

Here is my server log...

 

2013-12-28 00:15:23 [iNFO] Starting minecraft server version 1.6.4

2013-12-28 00:15:44 [iNFO] Loading properties

2013-12-28 00:15:44 [iNFO] Default game type: SURVIVAL

2013-12-28 00:15:44 [iNFO] Generating keypair

2013-12-28 00:15:45 [iNFO] Starting Minecraft server on *:25565

2013-12-28 00:16:01 [iNFO] Preparing level "world"

2013-12-28 00:16:03 [iNFO] Preparing start region for level 0

2013-12-28 00:16:04 [iNFO] Preparing spawn area: 1%

2013-12-28 00:16:06 [iNFO] Preparing spawn area: 11%

2013-12-28 00:16:07 [iNFO] Preparing spawn area: 23%

2013-12-28 00:16:08 [iNFO] Preparing spawn area: 87%

2013-12-28 00:16:09 [iNFO] Done (8.381s)! For help, type "help" or "?"

2013-12-28 00:17:02 [sEVERE] Reached end of stream for /24.140.81.67

2013-12-28 00:17:09 [iNFO] Disconnecting dasreyh [/24.140.81.67:56602]: Internal server error

2013-12-28 00:17:09 [WARNING] Failed to handle packet for dasreyh [/24.140.81.67:56602]: java.lang.NullPointerException

java.lang.NullPointerException

at cpw.mods.fml.common.modloader.ModLoaderNetworkHandler.acceptVersion(ModLoaderNetworkHandler.java:49)

at cpw.mods.fml.common.network.ModListResponsePacket.execute(ModListResponsePacket.java:115)

at cpw.mods.fml.common.network.FMLNetworkHandler.handleFMLPacket(FMLNetworkHandler.java:116)

at cpw.mods.fml.common.network.FMLNetworkHandler.handlePacket250Packet(FMLNetworkHandler.java:81)

at net.minecraft.network.NetLoginHandler.func_72501_a(NetLoginHandler.java:338)

at net.minecraft.network.packet.Packet250CustomPayload.func_73279_a(SourceFile:61)

at net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:462)

at net.minecraft.network.NetLoginHandler.func_72532_c(NetLoginHandler.java:80)

at net.minecraft.server.ServerListenThread.func_71766_a(ServerListenThread.java:55)

at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(SourceFile:29)

at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:691)

at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:276)

at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)

at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)

2013-12-28 00:17:09 [sEVERE] Reached end of stream for /24.140.81.67

2013-12-28 00:17:11 [sEVERE] Reached end of stream for /24.140.81.67

Might just be a dumb question, but were you trying to run 1.6.4?

Might just be a dumb question, but were you trying to run 1.6.4?

 

Says "Starting minecraft server version 1.6.4" at top of the log if that's what your asking.