Difficulties pushing out configurations with Prizm

I finally have installed prizm successfully, and am now having difficulties actually pushing out configurations to SMs.

I was able to successfully discover several APs, which then in turn discovered the SMs on these APs. Accepting these elements into the network went smoothly.

At this time, the only operation I am able to perform on subscriber modules is a simple reboot. So, Prizm is obviously able to control the elements, but when I try to apply any predefined or custom configurations, I just get this: “Failed to Apply Changes. Retries left: 2…1…Element not responding.”

Any thoughts?