The "HTTP error" isn't bothering anymore as I wrote in this topic http://www.silverstripe.org/dataobjectmanager-module-forum/show/15829 But as well as having the problem with getting the file properly attached (for what I try to search for an answer to other topics related to the subject), I found that with getting file attached to the Audiopage, it gives only the player to the page (that play button etc), not other content. So I have to check how to get audiofile in the among other content, text, images, etc. E.g if there's some news with text and images, I could put the audiofile under or between them. Also I made a static sidebar to the site, and I need to get it shown on the Audiopage as well. Well, some of these problems are the problems I think I'll get answers by searching.