A certificate could not be found that can be used with this Extensible Authentication Protocol. (Error 798)

Hi,

Trying to connect a point to site vpn im getting this error on windows 8 only. (wins 7 works find)

"A certificate could not be found that can be used with this Extensible Authentication Protocol. (Error 798)"

I tryed every thing on this post but nothing helps

http://social.msdn.microsoft.com/Forums/windowsazure/en-US/87c07656-61f4-4ad7-9b6c-248b484dc1ab/pointtosite-on-windows-8-client-connection-error-798?forum=WAVirtualMachinesVirtualNetwork

Any ideas ?

thanks