Erro no servidor ao conectar

Estava funcionando normalmente, mas agora o servidor e o cliente estão me exibindo estas mensagens :



Lado do servidor :

java.lang.ClassNotFoundException: PacoteTradugo.Mensageiro
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:340)
at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:626)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1613)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1518)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1774)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
at PacoteTradu.Server_1$ListenerSocket.run(Server_1.java:78)
at java.lang.Thread.run(Thread.java:745)





Lado do Cliente :

mai 29, 2014 4:55:43 AM PacoteTradugo.Sala$ListenerSocket run
GRAVE: null
java.net.SocketException: Socket closed
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:150)
at java.net.SocketInputStream.read(SocketInputStream.java:121)
at java.net.SocketInputStream.read(SocketInputStream.java:203)
at java.io.ObjectInputStream$PeekInputStream.peek(ObjectInputStream.java:2296)
at java.io.ObjectInputStream$BlockDataInputStream.peek(ObjectInputStream.java:2589)
at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2599)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1319)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
at PacoteTradugo.Sala$ListenerSocket.run(Sala.java:444)
at java.lang.Thread.run(Thread.java:745)