client authentication issues

[jean_opperman]

I have a couple of clients not able to connect to a wireless network from the Ruckus. They can connect to other networks fine, and other laptops connect to the network fine.
Setup is: Ruckus ZoneDirector1106 with 9.10.1.0 build 59 with two AP's.
The problem clients have different operating systems.
If I duplicate the network and change the authentication from 802.1x-eap to 'open' the clients can connect.

Please assist. 

[jean_opperman]

When I back up the CA certificate it is exported as a .tar.gz file. How do I go about installing that on a Windows client?