Resource center videos problem

[Kurt Kaufman]

>> > Run any of the tutorial videos available through the Rev Resource  
>> Center,
>> > hear sound but video is blank (green).
>> > Mac OS X 10.5.6 on 2.4 gHz Intel iMac, QT 7.6, ensharpen codec  
>> v1.1 supplied
>> > with Rev installation.
>> > What to do?

> Did you restart the computer after installing the codec? It doesn't
> say that you have to, but really you do.

Thanks. Have tried that. Still as above.  Also have Perian, Flip4Mac  
and DivX installed to function through QT.  Any known conflict there?
-Kurt