I just installed succesfully WordPress, but I'cant login. Everytime, the monitor shows me 'Error 404' in a white page. My blog is in htttp://mydomain.com/blog. The login.php is in http://mydomain/blog/wp-login.php and when I write my rights username and password the url changes to http://mydomain.com/wp-login.php?redirect_to=
Can somebody help me?