My username in Call or War (CoW) was Cerealnerd. My username in Clash of Nations (CoN) was Theaternerd. A few days ago I deleted my CoN account. Todat when I went to CoW it wanted me to logon, but would not accept my Cerealnerd username or password; so I told it to send me a link to reset my password. It did...to the Theaternerd account. So I logged into CoW under Theaternerd (LvL1 now) but could still get to the forum under Cerealnerd. I cannot reach the games under Cerealnerd. Theaternerd was for Clash of Nations, Cerealnerd was for Call of War. Any thoughts?

I deleted my Conflict of Nations profile. Different account...I wasn't even logged into Call of War.

Thanks for your time and effort, but that didn't work. I still can't get in. Oh well, I will move on.
Thanks again.

It still says invalid username. I can not log in. I can't create Cerealnerd as a new user as it says name already taken;..but it is invalid?

ok, this is what I have encountered, just for future reference for others.
Careful when you go between games (Call of War, Conflict of Nations and other Bytro games). I attempted to create a different profile for CoN and apparently it didn't. It logged me in as my existing CoW profile. My fault; I didn't verify my profile. When I deleted my, what I thought, CoN profile it took my CoW profile. The nice people at Bytro reinstated my account but I still couldn't log in...invalid username or password. When I logged in on Steam...bingo! I made it. So I am back with my old profile.
Next question...I created new profile during the time when I couldn't log in so I could get to the Forum. I am reluctant to delete the new profile.:)
Just an FYI for future problems.
Thanks to everyone involved.