Exception COMMUNICATION_FAILURE in CRM system

Hi,

After setting up DQM server in CRM while creating BP we are getting an error message "Exception COMMUNICATION_FAILURE raised during DQ call", could you please help me in resolving this.

And also could you please guide me in finding the file "flrfcsrv.xml" and the necessary jobs which needs to run after the establishing the connection between DQM and CRM.

Thanks in Advance.

Regards,

Tejraj