WinDVD8 Player Issues

Hi - I have a problem with some of the features of WinDVD8 Player Platinum.

If I play a DVD disc all is fine and all features/options work as intended. However, if I play a Divx/Xvid file, whilst the file plays fine, options such as Fast Forward and Bookmark/Capture are greyed out and unavailable.

Any help to overcome these issues would be much appreciated.