Issue: You see the "you've been logged in" message but after the redirect you're not logged in.
Solution: You may have a cookie domain or cookie path problem. Use tweaks.php to override your cookie domain and cookie path. If there are no other non-integrated WSN installs on the site that you need to avoid conflicting with, set the cookie domain to .yourdomain.com (use your domain name) and the cookie path to /.
Also try clearing cookies or using a different browser to login.
Issue: You see a message saying your username or password is incorrect.
Solution: First, try using your email address in place of your username -- you might have selected at Admin -> Settings -> Switches to use emails as logins. If that doesn't work, type your email in the lost password form at yourinstallationlocation/index.php?action=userlogin . If that doesn't work (perhaps you're running a localhost testing copy that can't send emails), follow this procedure:
Issue: You can login to your account, but you've lost your administrator privledges.
Solution: See [internalarticle=104]Can't login to Admin Panel[/internal].