I have tried to set up a wireless network at home between my pc & laptop but failed miserably

Both are running Vista Ultimate with AVG.
I have got my PC connected via a lan cable to a Belkin wireless router (model F5D7230-4).
The laptop already connects wirelessly to t'internet via the router, however I cannot see the laptop on the network when on the PC and vice versa.
So far, I have done the following on both laptop and PC:-
Set folder properties to 'shared'
Set network discovery to ON
Set filesharing to ON
Set public folder sharing to ON
Set printer sharing to ON
Set password protected sharing to OFF
Set media Sharing to ON
Both Laptop and PC show as connected to the network (have checked that network name is same on both) however still cannot see each other on the network.
Anyone got any ideas?
PS - please keep it simple as I am not a techie!
Thanks
Matt