Members aren't being added to the free level

When a new user signs up, they aren't being added to the free level, so even when they view the themes/plugins, they can't use any of them as it says 'Free Only' on there, and they are advised to upgrade.

It also says to upgrade to receive the webspace given to free members.

I did say about this in another post, but it must have got lost as I haven't heard anything for a couple of days, and I need to get this fixed so I can continue working on the site.