MD11 VC Overhead lights problem

Recently, I have encountered a problem with my MD-11 virtual cockpit overhead panel. I am not getting any of the switches/buttons to light up whether they are active (0n) or not. This is the first FS aircraft that I almost fly exclusively from the virtual cockpit .... its the best VC from a functional point of view of any add-on out there in my opinion ... great job on that. This problem with the switch lights occured suddenly on one flight and has continued on all subsequent flights (day or night). I have not been able to determine the problem. The 2D overhead panel lights work as they are supposed to. Has anyone run into anything like this? I run FSX-Acceleration on Vista-32 and have upgrades the the latest SP.Thanks for any help on what the problem may be. I suspect it's something I have done since I have not seen any posts with this issue.Jerry LauderbaughDelta Virtual Airlines