All I can tell you is that running Windows Home Server V1 as a guest OS under a virtualization tool is not a "supported" scenario, i.e. any issues you may encounter are going to be blamed on the virtualization tool, rather than Windows Home Server. (This
is as opposed to WHS 2011, which is supported as a guest OS under HyperV.)
I kind of doubt that the virtual environment is really to blame here (more likely something to do with add-ins) so try the same thing with physical hardware and let us know what happens...
I'm not on the WHS team, I just post a lot. :)