Comodo Firewall Blocking Networking

Hi

I have narrowed down my networking problems to Comodo Firewall 2.0 for my Win2k laptop. Please could you help me configure it to accept connections from my XP computer with Comodo Firewall 3.0.

Cheerz

I have read the manual & it seems that I did not have to add any trusted zones, jst un-stealth the ports on my tower running version 3 so that my laptop could see my tower PC.