Error:HTTP Post failed (HTTP 503 Service Unavailable)

I get this error after about 2-3 minutes while trying to login to the web album server using Gallery Remote. We just upgraded Gallery to 1.3.3. I'm using GRemote 1.0 on a Win2K wkstn.

Previous to this problem, when we upgraded to 1.3.3, we also had to change the IP address of the album server, but we are connecting to the server now with no problem, and I can login directly to Gallery and edit pictures.

I uninstalled GRemote, then reinstalled it after downloading the installer again from your web site. But the installer file is the same size as the other one, and it still says it's version 1.0, and it still doesn't allow me to login.

Ideas?