Cannot access admin after changing host

[icikite]

I made a test version on my new host under test.com (not the real name). Everything was working fine. Now the real.com is with the new host but I cannot access the admin.
When I ask for real.com/admin then it ask for my username and password then in come back with test.com/admin which is now eroor htp(normal it is replace)
Thanks for looking.

[kobra]

Have you made sure that the details in the admin configure.php file match those in your store configure.php file

The files are different BUT the details should be the same

[icikite]

Thanks very much for your fast reply. Yes I forgot to changed the server name...
Thanks again.