Problem With Divx

Ever since I got BitDefender, I can't download DivX videos (all my applications are updated). DivX is allowed through my Windows firewall, but BitDefender is blocking DivX, and I don't know how I can turn that off. I've been using DivX for years, and this is the first time this has happened.


The error is (whenever I try to download or stream a video): The downloaded video file is not a DivX file.


That happens whenever I try to download/stream a DivX video (and every single video I've tried is from a site I've used for over three years).


I'm using BitDefender Antivirus 2010 on Windows Vista.