I have to agree that asking for passwords is not a good starting point in order to make someone subscribe to a newsletter.
This solution pack has some great features but I think the subscription form could be just an email and I totally understand henrik.schlegel400884's recommendations.
I am trying to implement the same results without the need for a password and I am facing the same problem. No redirect is being done.
As I told you before PM is a great product but I think that the subscription process is very complicated in the eyes of our clients (owners of the website) and their end users.
To have the option not to use password and all that it supports (login system in order to unsubscribe) would be very useful.