Security preventing loadVars access

Im sure this is a classic problem. I am doing a flash project for a client.

This flash movie (lieing on Server A) calls an XML file on a totally different server (Server B). HOWEVER, it never reaches this xml file (although it reads the xml correctly when the flash is run on my computer). But to get it to run on my computer, I had to go into the global security panel and add the location of the SWF.

Now I tried everything to get the XML loaded on the SWF which lies on Server A. I went into the global security panel and added the folder on Server A containing the SWF, and the folder on Server B containing the XML file. However, it’s still not working.

Any idea why it’s not working and what I can do to get it work. I hope I explained my problem clearly. Looking forward to your replies !!!