Using digital outputs on VBL2351

I am working with a VBL 2350 and desire to use the digital outputs. I have used the serial commands as well as RoboRun+ to try to toggle them but I see no change in state on Pins 1 and 9 of the DB15 connector. Is this a known problem or a possible defect with my unit?

The outputs float when off and pull to ground when on . You need a load between the output and a positive voltage. Without a load, you will not see anything. See the manual which can be obtained at www.roboteq.com