Subcriptions completed, but access not granted?

Hi, I had this plugin working fine, but then I disabled it and enabled it again, and now it does't seem to be working.

Non-members are restricted to no content by the default setting. I have one access level which gives access to everything. Members can complete the registration process fine, but then, when I look in my backend, they are not being granted access or subscription levels. I have to add them manually. It wasn't doing this before. I have the free memebership add on enabled, and when I look at transactions under that free membership add on, it says no one has done a transaction, despite people having passed through the free membership. They are added to the members, and the to the users of my site, but, their access level and subscritions are blank.

What should I do?