Need advice pls

[silversurfer]

Sorry I don't know where to start I might be wrong, probably my question was answered before but I couldn't find any solution so far. I'm using Freestyler with Enttec usb pro on Vista with a core 2 Dell laptop. Nothing else installed it is a second laptop I'm using for a single purpose and the reason why has got Vista on it because the correct drivers can be installed this way. Yes it is an old machine.
My question: I've added some old fixtures to Freestyler, 6pcs Martin 812's and 4pcs Martin cx-4's they all work, respond to command but the mirrors and gobos are shaking all the time when they should not, no matter what I try. They work great standalone when not connected to computer and they perform smooth movements as anyone would expect. As soon as I connect to the Enttec and start using in Freestyler all mirrors starts shaking on all fixtures but they still execute everything. I'm using brand new DMX cables and termination plug as well.
I appreciate all answers. Many thanks

[Codeweasel]

Not sure but I vaguely remember a post on here somewhere that suggests checking/altering your universe setups so universe 2 is not set to Enttec Pro (I assume you are using just universe 1?). Hope that helps.