Problem solved by a phonecall, a summary:
Koen was trying to program a track for an Elite, where he wanted the LED pars to do a colourchase, and a dimmerpack having a static dimming-value.
He selected the colourchase-sequence as a source for the Track in the Track Wizard, but selected both the LED pars and dimmerpack as fixtures for the track. That was the problem: The selected fixtures will be using the selected sequence, and because there's no dimmer-value programmed in the colourchase-sequence, the dimmerpack didn't work in this track. He just needed to select only the LED pars for use with the colourchase sequence in the Track Wizard, and the dimmers (and other lights) were being recorded in the trackfile with their current (static) value.