You don't need to alter your forum details. You may end up with a new subs number that can simply be changed in your details so you can still access subscriber content.
Infact you can be a member without even subscribing to the mag, we are not choosy
I would think the password you are being asked for is a password for isubscribe as an existing customer not your password here or with MHS so you need to register as a NEW ISUBSCRIBE customer
Edited By JasonB on 15/05/2015 07:44:28