login module problem

Hy, i have an a problem with the game news template, the login work only in the home page, for example in a category the login don't work.

For example, i try to login here: [ http://worldgamer.org/category/microsoft/ ] but the result is:
[ http://worldgamer.org/category/microsoft/wp-login.php ].

How i can solve this problem?

1. Please go to wp-admin:
appearance -> menus
2. Change menu to User Menu
3. Edit "Log in" position and change from "wp-login.php" to " http://worldgamer.org/wp-login.php"