eNom says 'Bad User name or Password' although they are correct

Hi,

I've just registred on eNom. When I log into eNom directly it works as expected. But when I set up Accound ID and password in the Domain Mapping Settings inside my multisite network it keeps saying "Bad User name or Password".
I tried to change password but the problem is still here.

Is this because I haven't set an API yet?

Thanks!