Odd, when I go there from my Favorites menu, it comes right up. But when I click on the link in your post, it won't load and just keeps giving me the login menu over and over again.
This is copied and pasted from the address bar in my browser when I had the page up successfully, so give it a try:
ftp://hartmuthaas.no-ip.org/public/S...3COMMUNITYMODS
Edit: I just clicked on the above link and it worked fine. If you're still having problems, maybe try another browser?