Hey, I've been playing the 1.4.2 ftb pack for a few days, but my server upgraded to the 1.4.6 pack today, i've deleted all the files, and re-installed the launcher multiple times, but i keep getting this error, any idea of a fix?
2012-12-24 16:25:09 [INFO] [STDOUT] Connecting to **.**.**.**, *****
2012-12-24 16:25:09 [INFO] [STDERR] Exception in thread "Client read thread" java.lang.NoClassDefFoundError: org/bouncycastle/jce/provider/BouncyCastleProvider
2012-12-24 16:25:09 [INFO] [STDERR] at eq.a(SourceFile:28)
2012-12-24 16:25:09 [INFO] [STDERR] at ef.a(Packet.java:166)
2012-12-24 16:25:09 [INFO] [STDERR] at cg.i(TcpConnection.java:320)
2012-12-24 16:25:09 [INFO] [STDERR] at cg.c(TcpConnection.java:540)
2012-12-24 16:25:09 [INFO] [STDERR] at ch.run(SourceFile:93)
2012-12-24 16:25:09 [INFO] [STDERR] Caused by: java.lang.ClassNotFoundException: org.bouncycastle.jce.provider.BouncyCastleProvider
2012-12-24 16:25:09 [INFO] [STDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:87)
2012-12-24 16:25:09 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2012-12-24 16:25:09 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2012-12-24 16:25:09 [INFO] [STDERR] ... 5 more
2012-12-24 16:25:09 [INFO] [STDOUT] Connecting to **.**.**.**, *****
2012-12-24 16:25:09 [INFO] [STDERR] Exception in thread "Client read thread" java.lang.NoClassDefFoundError: org/bouncycastle/jce/provider/BouncyCastleProvider
2012-12-24 16:25:09 [INFO] [STDERR] at eq.a(SourceFile:28)
2012-12-24 16:25:09 [INFO] [STDERR] at ef.a(Packet.java:166)
2012-12-24 16:25:09 [INFO] [STDERR] at cg.i(TcpConnection.java:320)
2012-12-24 16:25:09 [INFO] [STDERR] at cg.c(TcpConnection.java:540)
2012-12-24 16:25:09 [INFO] [STDERR] at ch.run(SourceFile:93)
2012-12-24 16:25:09 [INFO] [STDERR] Caused by: java.lang.ClassNotFoundException: org.bouncycastle.jce.provider.BouncyCastleProvider
2012-12-24 16:25:09 [INFO] [STDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:87)
2012-12-24 16:25:09 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2012-12-24 16:25:09 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2012-12-24 16:25:09 [INFO] [STDERR] ... 5 more