Voltz Freezes after a short amount of gameplay

[ClassierBard]

I am playing on my server and after about 1-2 mins of gameplay, my game freezes. About 4 hours ago, my game was running perfectly fine. And this is my error everytime I leave the server because of the freeze:

2013-04-13 17:09:11 [iNFO] [sTDERR] java.net.SocketException: Connection reset

2013-04-13 17:09:11 [iNFO] [sTDERR] at java.net.SocketInputStream.read(Unkno

wn Source)

2013-04-13 17:09:11 [iNFO] [sTDERR] at java.net.SocketInputStream.read(Unkno

wn Source)

2013-04-13 17:09:11 [iNFO] [sTDERR] at java.io.FilterInputStream.read(Unknow

n Source)

2013-04-13 17:09:11 [iNFO] [sTDERR] at org.bouncycastle.crypto.io.CipherInpu

tStream.nextChunk(Unknown Source)

2013-04-13 17:09:11 [iNFO] [sTDERR] at org.bouncycastle.crypto.io.CipherInpu

tStream.read(Unknown Source)

2013-04-13 17:09:11 [iNFO] [sTDERR] at java.io.FilterInputStream.read(Unknow

n Source)

2013-04-13 17:09:11 [iNFO] [sTDERR] at ef.a(Packet.java:142)

2013-04-13 17:09:11 [iNFO] [sTDERR] at cg.i(TcpConnection.java:324)

2013-04-13 17:09:11 [iNFO] [sTDERR] at cg.c(TcpConnection.java:544)

2013-04-13 17:09:11 [iNFO] [sTDERR] at ch.run(SourceFile:93)

2013-04-13 17:09:11 [iNFO] [Minecraft] ClassierBard lost connection: disconnect.

genericReason

2013-04-13 17:09:11 [iNFO] [sTDOUT] Unloading Player: ClassierBard

If someone could help me out, that would be great.