Flash player 9, 10 – security policy file

I encountered problems for last 6 months to upload music on my dj site – www.djnet.lv . I have flash CMS admin on djnet.lv but the songs are uploaded to other site of mine, where HDD space is not a problem. about half year ago I couldnt upload songs from some computers, now its from all computers. It just stops. I had suspicion it had something to do with new Flash Player versions 9 and 10. So today I fixed it just by uploading simple file to my file hosting server: crossdomain.xml.
Flash player always looks for domain.com/crossdomain.xml file when it accesses its contents or uploads something. The is what my security policy file contains: