It's just because you are a new member, post a few messages and you'll soon be able to download.... Though there are still restrictions to keep our bandwidth to manageable levels, so it's only a couple of files per day.
Hope that explains things?
If you really want to download LOTS of files you can subscribe which helps to pay for the website, but we do NOT insist on it! It's your choice.... The only thing we ask is that you take an active part and show your interest, not a lot to ask is it?
Regards
Eddy