installer95

I have installed work 9.0 OEM on a new vista basic laptop, and everything seem to run OK, until i do a spell and grammer check on a document made withing works word processor, it the comes up with a message saying, "works cannot finish the spelling and grammer check because an error occured, some files maybe missing or corrupted. to fix this problem please reinstall works". I have uninstalled the trail version of office 2007 the laptop came with as i thought it maybe conflicting, but doesnt seem to make a differance, and have reinstalled works also, this again make no differance. if any one could shed any light on this, it would be a great help