Can't access additional e-mail accounts

I have signed up to the VM02 ID and have access to my original ntl email account, however i can't access any of the additional e-mail accounts that were set up later. I just get password can't be verified errors. Adding the account to Virgin Media Web Mail gives me "The entered credential or authentication information does not work or are no longer accepted by provider. Please change them" but of course I can't log in to change the password.

Help appreciated.