Are you sure that the Eyebeam clients support SRTP? It looks like you're getting a 406:
2011-03-05 23:21:08.650486 [NOTICE] sofia.c:5323 Hangup sofia/internal/
sip:1005@192.168.60.135:53664 [CS_CONSUME_MEDIA] [SERVICE_NOT_IMPLEMENTED]
You probably need to look directly at the SIP traces and see if there is any more information as to what's going on.
-MC