Teco FM50 and Mesa 7i77

So I wired up my Teco VFD to 7i77
7i77 pin 21 ENA5- -> Inverter 3 (FWD)
7i77 pin 22 ENA5+ -> Inverter 6 (+12V)
7i77 pin 23 GND -> Inverter 10 ( 0V)
7i77 pin 24 AOUT5 -> Inverter 9 (MVI)
And I got the spindle to turn on in Linuxcnc but no reverse and I can't control the spindle speed up and down.
Any suggestions on what I'm doing wrong?
Thanks Mike

Did you measure the AOUT5 pin as you set various speeds
to verify that the scaling is correct?

PCW wrote: Did you measure the AOUT5 pin as you set various speeds
to verify that the scaling is correct?

Don't know how to do that.

1. set spindle on and speed 1/2 of full speed
2. (assuming 10V is full speed) check that you have 5V on AOUT

PCW wrote: 1. set spindle on and speed 1/2 of full speed
2. (assuming 10V is full speed) check that you have 5V on AOUT

I'm not getting any volts at all.
Should there be another wire on the VFD? [attachment=25814]15871649155995057958970318230092.jpg

Is red AOUT5? if so you are shorting the analog out to ground