2 things I can see of are incorrect in your fixture file. But thats not the problem source of the fixture not responding.
The pan & tilt range should be 255. not p170/t110. I can see where you get those values from, but that values are the degrees (angle) that the mirror can move - those 170 (and 110) are spread over dmx values 0...255. (unless otherwise documented, its not, so the range should be 255).
You need to test somewhat further:
1. Make sure you adressed the fixture correctly - is it a dip-switch adress method? Re-check if you did understand it correctly. Tell us how, what the adress should be and post a picture of the dip-switch.
2. Add your fixture to your freestyler setup after making sure your Velleman interface is working.
3. Some fixtures have multiple modes, each mode having its own DMX channel descriptions. Check if its in the correct mode.
4. Select the fixture and move _all_ sliders on the right side on your screen from 0 to 255. See if _something_ moves or happens. (as I'm thinking your channel information may be faulty)
5. Do this test with only this fixture connected in your DMX chain and with other fixtures connected in your DMX chain. Make sure they are working.
6. At all times have a look at the show output window. Here you'll see FreeStyler's values to the DMX chain. They should be the value you are setting.
If all this does'nt make the fixture do anything, something 'bad' is going wrong. Search deeper, try harder.
Most of the time people asking here when fixture's does'nt respond its one of these things:
1. Did'nt address the fixture correctly because they did'nt understand the dip-switch config too good.
2. Used bad cabling, or should have been using phase inverted cable.
3. Their DMX interface did'nt work because of a driver issue.
4. FreeStyler was set to Virtual interface instead of real interface.
5. And I'm forgetting few here...
I googled the fixture:
http://shop.nwlightingfx.com/pro.duct.sc?productId=4
It says here its a 7 channel fixture?
Here's the manual:
http://www.nwlightingfx.com/uploads/Pas ... manual.pdf
I see lots of differences. You should re-check.