Hi, Can you post your server config for us to see.
Also, the client cannot resolve your hostname server.qubee.com.bd:
Tue Oct 09 13:55:07 2012 RESOLVE: Cannot resolve host address: server.qubee.com.bd: [HOST_NOT_FOUND] The specified host is unknown.
Check your dns records and make sure server.qubee.com.bd is pointing to a specific IP as A address.