Login problem

Hi, I hope you can help me, I used the Google Apps Login for my WordPress, and the google users are from a School, but if the user is logged with another account wich it’s not from the school the login form sometimes turns in to a bucle, in fact someone in the school it was testing, appears her the follow message: Session Mismatch – Try again but there could be a problem setting cookies.

I Used the login to two pages.

Thanks

The page I need help with: [log in to see the link]