I have a Logitech Sphere AF webcam, using Windows XP SP3.
I've been using Logitech's own software to record video diaries. Today I used Gmail for the first time to video chat with a friend - since then I can no longer receive a picture when trying to use Logitech's software. The camera responds to tilt/pan controls and the operating light is on, but just only a blue screen shows. I've just added a USB extension cable (it has a booster built in). I logged back into Gmail and an image showed up fine there, but there is no picture elsewhere.
What could be causing the problem, and how I could fix it?