pzx / sip2peer Goto Github PK

I got this message 
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
    at org.zoolu.tools.Base64.main(Base64.java:190)
When trying to execute java project

i have this problem when i tried to execute the project:
08-25 07:09:10.460: E/AndroidRuntime(458): java.lang.NoClassDefFoundError: 
it.unipr.ce.dsg.s2p.example.peerdroid.SimplePeer
please help me.

Android application is working file.
SBC server is running in my eclipse. BootstrapPeer server is also running my 
eclipse.
when i connect with two android emulator then it working perfectly. we 
successfuly send ping message to each other.

But if the emulator running in different machine (both machines are in same 
network) and send join message then server receive the join message from the 
emulator. But onDeliveryMsgSuccess call back is not called. 
onDeliveryMsgFailure callback is called.

If BootstrapPeer server and emulator run in the same machine and send JOIN 
request server always send onDeliveryMsgSuccess callback.

Why this is happening ? I am stuck here please help me.