Apparently, the X10 camera setup just isn't going to work. At all.
Here's my tale of woe so far. If anyone can help, I'm all ears.
After much installation pain, it was working except for flashing video on my laptop (Windows 7, x64). Then I installed iSpy and a windows update and rebooted. Camera no longer worked. Then I uninstalled iSpy and rebooted again, wiped out all traces of ActiveHome and started over. Cameras still don't work, and now somehow Windows refuses to even install the driver anymore (no matter what I do, it says the driver is not compatible with my architecture, which it certainly is).
So I tried moving everything to an old laptop (really, really old). I reformatted it and installed 32-bit Windows XP on it. Installed all the ActiveHome stuff and the camera drivers. It wouldn't work at all -- everything installed, but it said the camera device could not be started. I'm guessing that's because it's USB 1.0, but don't know for sure. I do know it wouldn't work.
So I gave up on that and tried installing on a desktop computer. This one is Windows 7, 64-bit. Installed ActiveHome from scratch, made sure the right drivers installed for the camera, etc. It doesn't work. I get nothing but a black screen in ActiveHome. And to make matters worse, I can't check with SimpleVideo because it doesn't work at all -- crashes immediately upon startup. That computer has an AMD CPU in it -- maybe that's an issue?
Anyway, the point is, I've tried to get these cameras working with ActiveHome on three different hardware architectures, on two different versions of Windows, and *none* of them will work reliably, if they even work at all.
I'm starting to get the feeling these cameras (or at least the software driving them) are just not intended for actual use.