not authorised please login when trying to login

Hi Saka

I have had sef advace for a wile but i just upgraded to the latest version now and i eem to have introduced a problem.

when sef url's are off i can login with no problems in the front and back end but when i turn on sef url's in global config i can login to the backend but not the front

i get a message saying

"You are not authorised to view this resource.
You need to login."

I am using CB for managing users and i have made sure that it has the sef ext uploaded.

Thanks in advance for your reply.