Server on VMware not reporting back

We have loaded Nagios on a server that sits on a virtual machine. Every status comes back warning next to the service. And then it says “could not fetch information from server” After running a test on that server, I get this code…

e \Socket.h(645) bind failed: 10048: Only one usage of each socket address
ocol/network address/port) is normally permitted.

l \NSClient++.cpp(476) NSCLient++ - 0.3.5.2 2008-09-24 Started!
d \TrayIcon.cpp(53) Failed to load: ChangeWindowMessageFilter aparently we
ot on Vista…
e \Socket.h(668) Socket did not start properly, we will now do nothing…

Socket issue of some sort…becuase of VMWare?

Thanks.