We would recommend what J-D said, look at the wiring diagrams on the Winnebago site and check all of the connections. Or a call to Winnebago support tomorrow. They may end up contacting Kwikee based on Winnebago's ability to troubleshoot.
We had a problem with ours coming in on its own with the parking brake set, so kind of opposite. DH talked with both Winnebago then Kwikee. We started with replacing the switch (the cheapest fix), which didn't do the trick. Then on to the control module. Since our year didn't have a key shutoff we added a switched 40 amp cutoff switch. The combination of these two has done the trick for us...the power switch alone keeps us from ever seeing it happen again, so it is hard to say with certainty that the control module replacement fixed it.
The problem seems to be that the slide control (at least on ours) is in one of the storage hatches, which are those nice blow mold water-tight areas. But a bit of moisture in there will stay in there and we tend to think that the humidity in there played into our problem.
Best of luck!