Thanx for your advice.
But as i said the main problem wasn’t rough spikes, but the speed how Zaxwerks works with Illustrator files.
Even if i am working in the draft quality and in the quarter resoulution, without motion blur, RAM preview renders one frem approx. 1 min.
And it is not normal.
With 4.0.3 version there were no problems in the RAM preview. In the draft quality ir played almoust in the real time.
Jacob