How have you set the $WAGLOBAL_Admin_UserName and $WAGLOBAL_Admin_Password in the WA_Globals.php file? to test as the Username and password, you need to set it like:
$WAGLOBAL_Admin_UserName = "test" ;
$WAGLOBAL_Admin_Password = "test" ;
If you still have a problem, try deleting the WA_Globals.php file from the server then re uploading to make sure your changes are going up to the server.