My FS Bakup is failing with 25

Master Server 6.5.6 (Unix)

Media Server : 6.5.6 (Windows 2008)

Client :6.5.6 (Windows 2008)

Below is the error <16> write_backup: cannot add fragment to image database, error = cannot connect on socket

I have attached the client logs too...

Telnet/ping working good.....But when i go to client Host Properties getting error...Snapshot attached....Also bounced Media Server Services and Client ....

Any help will be appreciated.....