wireless router

I have a Netgear-108 Mbps Wireless Firewall Router-WGT624, os is xp pro. The problem is this, I can not get the 2 computers to see each other, They both connect to the internet but A can not see B. I have even gone to netgear’s support and they can’t help me (its so hard when you can’t even understand the support line-another country!). computer A is a 2.4 Mhz and B is a Sony laptop.