I installed WordPress MU because I need to setup many blogs and I don't want to install the normal wordpress everytime. Furthermore I am limited to 50 SQL databases so I wouldn't be able to create more than 50 blogs.
After a lot of trial and error I succeeded in installing it on raphael91.xtreemhost.com but as soon as I created some blogs (subdirectory blogs) and I try to view these blogs it gives me a 404 error, and effectively the folder it links to is not available on the server. Why can't wordpress create that folder in my base directory?