Hoster 5.05 Won't Open

[FRadspinner]

Instlled Hoster Lite 5.05. Made all the required changes and it was working. Then after installing Microstoft Office, Hoster would not open up anymore. So we uninstalled and reinstalled. The installation went well, no problems, but hoster lite will still not open. We also removed Microsoft Office in case it was interfering but I don't see why it would interfere. However Hoster will still not open. Has anyone had this happen or does anyone know why this is happening? It is a Windows7 version, 64 bit computer. Thanks