Allow socket connection in Solaris

I have 2 solaris machines and I have an application that opens a socket via port 8556, but for some reason the connection keeps getting refused.

When I run a netstat command on the second server (serverb):

$ netstat -an | grep 8556
127.0.0.1.8556             *.*                0      0 128000      0 LISTEN

Which seems to indicate the port is open, I can even telnet to the localhost:

$ telnet 127.0.0.1 8556
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
^]

But when I try to telnet from the first machine, the connection fails:

bash-3.00# telnet serverb 8556
Trying 5.5.112.112...
telnet: Unable to connect to remote host: Connection refused

I can ssh successfully from servera to serverb, but the socket connection is refused. I have tried the hostname and the ip address, but no luck. Also i can telnet to port 22 and and 23 from servera to serverb, and these ports appear to be open, its just a problem with port 8556.

What could be the problem here?