I have this strange problem: One of the resellers can't login to his account anymore. He used to be able to do that, but all the sudden he can't. I changed his username and password, and the problem persists. I also tried to login with the new username and password, and ISPConfig rejects the credentials. What could be wrong?
i think is database problem .also you can check your service with other user name and passwords so you can make sure where is the problem
check your other reseller accounts to make sure the problem is unique to this reseller, then in either case check with the hosting service.