it looks like you have most of your trouble shooting done right.
that being said I can't say i know how the Intimidator works?
How many of those do you have?
do you have another fixture or dimmer pack or dmx fixture you can test to see if it works?
Maybe you need switch 1 and 10 on the Intimidator?
I recommend not to use a profile to test if the SD3 works.
for fixture 1, use 32 DMX channels.
that way you can read your intimidator manual and work with individual channels to see if it works.
The intimidator gets DMX signal the second you plug it into the console whether you have a profile assigned or not, so i believe its a setting in your lights.