Map drive access denied

Hello,

I have shared one folder for everyone user with co-owner privilages in Server 2008,We have domain/client envirnment, we have client computer with o.s xp and vista(both) and all are the members of domain.Now i make the map drive in the client computer, but i get so surprise that i can access the map drive from some computer but can not access from some computer. its giving the below error.

"windows can't access the specified path or file you may not have the appropiate permisions to access them."

But i have give full access permision to the above mention group, i dont know axactly what might be the problem.\

How i can access the share folder from all computer as map drive?


Anybody help will be highly appreciated.

Thanks

Regards,

Akram Baig

Network Administrator