I HAVE READ THE HOW-TO THREAD'
According to the common issues and solutions thread, the solution to my problem is this:
"- Upon login, the game says: 'The specified Online ID or account name is already in use'.
Solution: Your nickname has probably been reserved. You need to claim your old nicknames. Activating them takes some time."
The problem I am having is that I already did do exactly that, and the reservation was approved: http://forums.revora...ickname-dgfone/
So the question is really simple: is there a way to be able to use my old username? I can continue using a new name as I did before the approval finalized (and in this case, also after), but I would rather not, because it's a long way to get back to where I was before.
I got both games from the C&C 3 Deluxe Edition. OS version is Windows 7 running on Wine in Linux. This should not be the source of the problem.
Thanks for any help!