Tcp Socket (Connection refused) to my server box

I installed a fresh copy of Solaris 7 and present up my ip and domain for my web services but when I try to connect to it I get the following error;

TCPActiveOpen[0x0]: connect failed tcp/192.168.1.148/7900: 146 (Connection refused).

the port is open in my router but I don't no were to add it in Solaris also firewall is not installed, can some one point me in right direction please thanks.

The port being open doesn't matter unless something's actually listening on that port. What service should be listening on port 7900?

so fare as I know there no program or service using the port I did netstat and there as no port being used but still get refused messsage

With nothing running on port 7900 to accept connections to port 7900, it cannot accept connections to port 7900...

I think problem maybe bit more complex after reviewing debug logs it shows

mpreq_mux#000R2: MPMuxOpen[0x12a290]: Unable to create low-level I/O 
channel.
mpsys_tmo#mptmo.c/522: MPUntimeout: 0x768c8, 0x12a290: No such timer event.
mpreq_rq#000P6: MPSessOpenInternal: Couldn't create/find Mux channel for 
Mpath session.

so MCP must not be connecting that's reason why I got no idea what MUX is ha

If the service which should be running on port 7900 is not, that would explain not being able to connect to port 7900, yes.