Necron Intro problem

[Finrock]

Dawn of War: Dark Crusade work otherwise well in my computer, except for a one thing. When I start to play the Necron campaign, the Intro for them lags for long time and only voice continues onward. Other Intros as well as the game plays smoothly and there seems to be no scratchs in cd. What could cause it and what should I do?

Ps: Only asking because too stupid to figure it out myself.