I'm having a problem logging into my website. I moved it and the front end looks great. I've changed the permissions so that its all 777 temporary.

But when I goto site.com/index.php/login it looks fine. If I type in the wrong user and password it kicks me out great. BUT, when I type in the credentials right the url looks good (index.php/dashboard) but It's showing the login page again and won't let me in to edit. any ideas?

it seems like though it is sending me to the dashboard, but I dont have permission to view it.