EnableDVDUI ???

Hi. I followed the instructions, or at least I tried to, for using the DVD decoder pack with windows XP, media player 9. There is a huge problem, though: nowhere in my registry is there any instance of the text "EnableDVDUI" so it is impossible to double-click it!

In fact, there is not even a folder named "HKEY_CURRENT_USER/SOFTWARE/MICROSOFT/MEDIA PLAYER/PLAYER/SETTING" but there IS a folder named "HKEY_CURRENT_USER/SOFTWARE/MICROSOFT/MEDIA PLAYER/PLAYER/SETTINGS" (plural, S on the end of "SETTING"), so I didn't know if I was even looking in the right place. So I just did a search for "EnableDVDUI" and it is just not there, anywhere in the registry.

So, now what? I just don't understand how I can have a DVD PLAYER that won't PLAY a DVD!!! AARGHHHHH!!!!!!!!

Thx,
Andria