Hello,
I changed the cookie settings of the Forum (coz I'm trying to optimize the page load speed), which means you could have problem to log in.
In this case, you'll always come back to the log-in page after have had entered your login & password.
If this happens to you, either delete all cookies you have on managames.com or all the cookies in your browser (careful, the later might force you to re-login and/or lose custom settings in some other sites you may visit regularly).
EDIT: this is same if you can't enter a correct Validation Code (either while posting or registering) ; it means you have to delete all your cookies.