Home network access problems

[HipHoper]

I have my MAIN computer (winxp pro) and an EDIMAX non-wireless internet router.
Occasionaly, i connect a client or another comuter to the router, and the strange thing is that i can connect from the MAIN computer to the other one, but it won't let me access the MAIN computer.
I opened DMZ on router, disabled computer winxp firewall, but it still acts the same.
Please advise.
Thank you

[Kermit D. Frog]

What operating system is the second computer usually running?

and btw, you might want to turn off the dmz on your router, that won't do anything to help your situation, but will give those "bad people" on the internet easier access to your network.

[HipHoper]

Love your MUPPET SHOW name....hahhaha
Well..usually the clients also have winxp pro with same workgroup name.......

[HipHoper]

Well...found the problem.... ME :)
I've noticed file and print sharing disabled in MAIN computer....Probably one of my "network security games".....