The last post was in response to your original question but i think you deleted it since.
Regarding the error: Have you got PostgreSQL 8.0? If yes please update to this to fix this problem: http://www.rvgsoftware.com/hm/hmupdate1.06.01u2.exe
Although i think youll find postgreSQL has stopped again so try restarting it, or stopping and starting it and the error should go away.