X8/4 enable goes low when MAX or LV program executes a move

I have a UMI-7444, Kollmorgan AKD P0060306, 3 stages, NI PXI-7350. I may have changed something but not know what.  The system was working. Now the following happens:

• Full power down and reboot
• X8 pin 4(enable) is high
• Start Kollmorgan Workbench and connected to the stages. All green no problem
• X8 pin 4 is high
• Run my LV init / reset program.
• X8 pin 4 is high
  • Start MAX and attempt to move one access in the 1-D Interactive utility. OR run my LV program to move.
• X8 pin 4 is low and Workbench shows “Device Inactive because: the hardware is inactive”
• X8 pin 4 is low

I cannot clear the HW and Device inactive status in Workbench without a power down and reboot.

Please help me understand what setting or problem causes the X8/4 to go low.

Thanks,