HP Data Protector port 5555 issue

Dear All,

I have my HP Data Protector installed on the backup server.
I want to connect this backup server with the client server through
telnet port 5555 like below

telnet < ipaddress of client> 5555

But when I try like this , it says ...Connection refused ...unable to connect to remote host.

I tried to open the port 5555 in the client machine...which I could not.

Kindly help me in opening the port in client machine.

Rgds
Rj