Yes sure, get codecs. CODECs list and alternate players for Movies. A good codec to get is http://www.divx.com/divx/play/?hp3playmoreinfo

Normally I recommend using a different player as it has in-built codecs & is generally very reliable; VLC - (click on link) _ (choose nearest mirror site). Try it out. You can also get other skins for it off that site. Some are quite Kool!