My laptop can't share a printer with my PC

My laptop can't share a printer with my PC

I have a Belkin wireless router and all devices including my laptop can connect to the internet. However I can't get my laptop running on Windows XP to connect to my printer through my PC running on Windows Vista. I read all the posts but nothing works. I get an error message on my laptop saying 'The name of my network' doesn't give me permission. How do I change this?