I didn't know about NSN and I just found out it and here's the problem.
A friend of mine installed NukeSentinel but he messed it up and it didn't work. So I had to uninstall all of it. I just followed the readme file and uninstall all the stuff that it asks you to install. Everything seems to be working except if a user try to login they get a blank page and in the address bar shows
http://www.mysite.com/modules.php?name=Your_Account
So now the users can't even login. If they try to login it just comes up with a blank page with no error or anything and the address bar shows the above link.
Please can someone help out? I would really appriciate it.