Library is Missing

I have a big project in Flash CS4. Things have been normal for several weeks. Today the Library was missing. The library tab is visible. My project name is selected. But the rest of the panel is all gray. I have downloaded an update to 10.0.2. I am working on a Dell Laptop XPS M1330. I went to the Dell site and downloaded & installed the one video driver update. I also began a new project and tried to import one image into the library. It imported successfully, but the library panel is still blank.
What should I do?
Thank you
Tony