asset bundles download problem

Hi guys, I'm in need of some much appreciated help here.

I'm using asset bundles to load some assets into my game and I have troubles when I try to download them in the web player build. The server I use has the crossdomain.xml file in the root directory and everything works perfectly fine from the editor, even if I put a random host url.

I tried using wireshark for debugging and the http request for get crossdomain.xml is getting an ok response in both cases, but in the case of the web player, the next tcp request doesn't get any answer and everything just freezes from then on.

I hope you guys can give some suggestions. Thanks.