Wireless authentication not working on mac books and windows 7 net books

Hello - we have a wireless network set up with a certificate authentication coming from our Windows 2003 server.  The wireless was originally set up with a few configurations.  One wireless was set up with no authentication, the second had to authenticate with an active directory account.  This all works fine except for mac books and windows 7.  We got this to work with the windows 7 as long as we plug them into the hardwire, but we have hundreds of these devices and that is too much work.   We are trying to get rid of the non-secure wireless and just leave our secure wireless up and running.  When the user tries to authenticate, it does nothing - does not refuse, just will not connect.  If the mac user gets the user name and password prompt, an administrator must type in their credentials.  Students cannot authenticate because they do not have administrative rights on the mac book.

Any way around this?  Can the certificate be installed on each mac book?  Or should we generate a new certificate?  We also have hundreds of mac books so a solution without having to touch each mac would be great.