Make sure your relay has at least 15amp contacts like the gecko document suggests and I would go for a heavier relay if possible.
Also remember that this is an E-STOP circuit and not a day in and day out contact. The relay is under a lot of stress because of what you are doing to it and it will take a beating. It will work great but I don't think it will survive hundreds of contacts when switching in this application, but I could be wrong.
I think the contacts will initially see power supply voltage which is 65v dc in your case. Make sure the contacts are rated for this kind of dc voltage.
The drive ground is on Pin 1 and comes from the dc power supply negative terminal.
I would open the gecko manual and go thru all of the setup steps again. It is very easy to make a wiring mistake.
I would also do the ohm meter check listed on the gecko site to determine if you have cooked a drive.