No Torque (power?)

Hi all,

I finally had the chance to get back into my mill project, and
actually made some progress, but still have a major problem.

After buying new motors (PH2610-E2.9B), blowing up one Gecko (G210)
and replacing it due to a stupid mistake, and discovering the new EMC
BDI (rc44) [nicely done by the by] has made some really nice progress,
I got everything running. (these motors -
http://www.electrotec.us/DesktopDefault.aspx?TabId=62&ProdId=417&Action=ShowDetails)

I've tuned the ini file and the motors hum right along
nicely, but hooked up to the belts, they won't budge a bit.
Hum and chatter, but no movement.

By themselves, everything runs great, but if I grab the pulley on the motor
shaft, I can stop it with seemingly light pressure between thumb and
forefinger.
(running 40 tooth pulleys on the motors, 20 on the leadscrews)

If I had to desribe it, I would say that the seem to not have any torque...

I'm running 65VDC to the Geckos, with a 66K resistor for 4.1 Amps,
have the capacitors on the Geckos, and motors wired in parallel.

Any ideas on why I just can't get any real power (torque?) from this thing?

Thanks,

Weyland