Hello,
I'm having a problem after changing from server.
I recently had my blog system on an shared Dedicated Hosting service, and near 5000 blog's.
After changing the system to a new dedicated server I'm having the following problem.
Users that where on old server can't login with http:\\user.domain.com\wp-login.php - they get a blank page on IE an a  on Firefox.
If the user login with http:\\domain.com\wp-login.php - they can go to admin page but when making some change, or making a new post they get again the same pages, blank on IE and with  on Firefox.
I already try to find the problem but I'm getting a way to fix this problem.
Can anyone give me a help?