When i type my fourdeltaone username and password it tells me that i am entering incorrect username how to i bypass this problem. Thanks

You can't bypass authentication, also make sure you enter your username and password correctly..

I have entered my username and password correctly, i was getting onto the full multiplayer game fine and now i can't, i also have this same problems with mw2 aswell. I enter my login details on here and i get acces to this site with no issues.

I have entered my username and password correctly, i was getting onto the full multiplayer game fine and now i can't, i also have this same problems with IW4 aswell. I enter my login details on here and i get acces to this site with no issues.

What's your OS?.

Make sure your username and password contains alphabetical characters and numbers..

Still having same problem.

What's your OS?.

Windows vista, amd dual core 3.0 ghz, 4GB Memory ram, 1gb nvidia graphics card. i have played the game fine up until now. i have tried making different acounts on here but i get the same negative result.

Delete IW5M.ini / IW4M.ini if you have it.

That worked, thank you!, very much apreciated.