hooking up wireless net at home

I’m trying hook up a home wireless net between laptop running xp pro sp2 and desk top using xp home sp2 so I can use printer from laptop. I can see comupters on both, can access laptop from desktop, cannot access desktop from laptop. gives me “do not have access rights when I click decktop. I am a student just beginning programming and have “some” networking studys from 1999 on NT, so please be gentle on tech verbage.