Well. What OS are you running on each?
Make sure something is shared on both laptops and then make sure no firewall software is possibly blocking file sharing across the network.
Create a mirror account on both. Something like username: SHARING and password: WHATEVER
If you are not using simple file sharing on one of the machines the above would enable you to set permissions for the user called SHARING.
You will need to give more info on your setup. If they receive their addies via DHCP they should see eachother if the access point is negotiating/controling it.
Try pinging them. If you can't ping them, it doesn't mean they cannot see eachother, the firewall might kill ping requests....