This happened to me as well.
But only when I restart my computer.
Seems no one knows what's happening.
Or at least haven't bothered to post a solution.
What I've done is go into TivoDesktop and under server properties, uncheck the box that says "start TivoServer when I log onto windows".
Once your computer has fully booted, and you want to start TivoServer, open TivoDesktop, and then open server properties. This usually starts TivoServer for me.