help w/Userman, user can only signin if admin createsaccount

so when a customer clicks on the sign-up link, enter their information, and paypal doesn’t go through

→ then if the customer tries to login to their account the username/pw, the page reloads with MT msg: invalid username/pw, so currently if Paypal fails, then they can’t sign in again with the same account to add credit

anyone know how to fix this, have this same problem?

please help, b/c currently I have to create each account manually for username/pw to be accepted or use vouchers = pain