I reconnected an Apex feeder that had been working previously (had the feeder offline for a couple of weeks). The usb cable was a little sensitive to get it connected again because looking through the side of the USB port in the rear of the feeder, I first saw a blinking yellow light but when I fiddled with the connection a bit, got it to turn solid green). But when I click on Feed A (which the Feeder wizard lists for the feeder, nothing happens, i.e. the feeding drum does not activate. Through the Control Type (Feeder), I have it set up to do two feedings with one drum rotation. What’s wrong?