Well, since the release of the demo I have played this game once, since then I cannot login into multiplayer. I get the message INVALID LOGIN DETAILS, PLEASE RETRY every time I try to login. I made two accounts just to see if that was the problem. It was not. I reset my password... a few times... that was not the problem either. So... what is wrong with the damned login system!? Can this not be fixed??

I had the same problem. Even made 3 account on all my 3 email adresses. What i did to fix it was delete my account. Then made a new one with the same email adres but another Username. After that i was able to log in.

(no i have another problem. If i wanne play online the game says i'm behind i firewall so i would find servers. Then i find servers. But if i wanne connect to one it says my serial is in use.)

Wow, these problems/bugs/glitches whatever you want to call it are starting to become a real nuisance... another way too early release.... I just hope they can fix all this faster than treyarch fixed black ops

Welcome to the club. Bug has been here sense Demo and likely Beta as well. Am under the impression it won't be fixed anytime soon. Rumor has it there will be a patch tomorrow, but I have to work tomorrow; congratulations on ruining first weekend after launch.. bad move... oh well.. insanely fun game though.. sad to see it release in such a state.. a lot of hard work gone down the drain.

http://www.gamesas.com/forums/viewtopic.php?f=40&t=10954&start=780

They're more likely to see it if you post in there. This will prolly end up buried.