Thanks DrJBHL, but changing my dock background to Aero Reflections did not resolve the problem. Also, Impulse shows that ObjectDock Plus is installed correctly. I will open a ticket and see what happens.
The SAME THING is happening to me. THe ability to see/utilize the system tray icons is the ONLY reason I paid for the Plus version of ObjectDock. And now it's useless. Responses from Support take about a WEEK, and are vague and INEFFECTIVE. Getting this fixed for Windows 7 users should be a top priority, especially if they want to continue to sell this product.