nameserver problem I think?

Hi,

I have Mandrake 9.1 setup and working as an intranet server but when I am
using my other system, windows to access the internet, I can't see my
intranet using:
www.pab.cxm
or pab.cxm
or http://pab.cxm

I have to enter 192.168.0.10/.........html or php or whatever to see
whatever I need of the intranet.

Is this a problem in my configuration and what files would I need to
change?

Thank you,

Peter