Why does the remote control viewer never load?
There is an issue with the kaRemote.dll ActiveX component on the machine you are attempting the remote control session from.
You need to delete the kaxRemote.dll from C:\windows\Downloaded Program Files. The easiest way to do this in Vista is to start a command prompt with Run as Administrator privileges, cd into the above directory (use tab completion) and del kaxRemote.dll.
Then restart a remote control session and install the ActiveX component again. You should see e.g. the WinVNC icon launch in the task bar once you have successfully installed the component and started initiating the remote control session.
Remote Control tab