Trouble Mapping Network Drive

I searched the forum but couldn't find the same problem, or maybe I just suck at searching. I have a desktop PC running Windows Vista and I'd like to share a couple folders (which are in the main Documents folder) on it over a wireless network with my netbook which is running Windows 7 Starter. I've gone into the network sharing center on both computers and have turned on file and printer sharing and turned off password protected sharing. I right-clicked on the folders to be shared and enabled sharing under the "Sharing" tab. When I try to map a network drive to one of the folders I get an error that says I do not have permission to access to access the folder. Anyone have a suggestion on how to fix this? Thanks.