Internet works ok on all 3 computers on my home network but I can't share files and printers anymore after I enabled WPA2 security.
With it disabled it works perfectly.
I have Belkin N1 router and while I'm sure there must be something in the configuration to be set, I wasn't able to find it.

I have enabled MAC filtering if that matters.

The files and printers sharing will stop working as soon as I enable the WPA2 security.