Hi Abdul,
 
  looking at the documentation this isnt a valid option:
 
modparam("mediaproxy", "mediaproxy_socket", "192.168.1.77:30001")
 
Check http://openser.org/docs/modules/1.3.x/mediaproxy.html
The mediaproxy docs included with the mediaproxy software gives details of how to configure
remote mediaproxy servers, from my understanding you need to have a local proxydispatcher.sock
socket (defined in openser.cfg) then you need to follow the INSTALL and/or README files included
with mediaproxy to correctly configure your remote mediaproxy servers (and how they are located
by the proxydispatcher)
 
cheers Andy.