Problem with video on custom domain in passworded galleries

I'm having trouble with video on my custom domain in password-protected galleries. It won't play. If the gallery is unprotected or I'm using my nickname.smugmug.com domain, everything's OK. Here's my "matrix"...

[FONT=Courier New]              Nickname         Custom domain
Passworded       Works         No worky
Unprotected      Works               Works[/FONT]

This issue has been covered before, and apparently was fixed. I'm even able to see Andy's example video on his passworded and custom-domained site.

Any idea what's going on with my site? Here's an example...

Works: http://wellman.smugmug.com/gallery/8698778_ei4N2
Won't work for me: http://www.wellmanhouse.net/gallery/8698778_ei4N2

I see the same behavior from FF3 and IE6. I'm running XP SP3. I've done all the proper cache-clearing in my testing.

Can someone help? Thanks...