Ajeh tried to help you with this earlier..
You appear to have an error on your site, possibly in the configure.php file that is setting your site to a different URL ...
Compare the two files:
/includes/configure.php
/admin/includes/configure.php
see if you don't have an error on the admin configure.php ...
If you are not sure, post the file:
/admin/includes/configure.php
from the server ...
without your username and password and we can help you fix it ...
It's best to post any new messages on the same issue in the original thread. Maybe you could post the contents of your /admin/includes/configure.php file (without your username and password displayed). This will give us a better chance at finding out what's wrong.