Cannot access shares on home network

I have a 2 pc network connected via my DSL modem. A is my desktop cable
connected B is my laptop connected wirelessly I can see both machines but
cannot connect to shares. When I try I get the message "not enough server
storage is available to process this command".
I'm using WinXP pro SP2. I've run the network setup wizard many times. Every
time it cannot finish. It says "an error occurred during configuration of the
network on this computer"
Both machines can access the internet fine.
I use Comodo firewall. My network is listed in Network Zones with a range of
addresses for my network.
I have been struggling with this for longer than I can remember. Would
greatly appreciate any help

thank you