Certainly sounds like the file is corrupt. Try the blind export script at Adobe Community: InDesign 6 is crashing when attempting to open a particular document. All others are opening OK. to see if you can get it exported to IDML.
Thank for the effort Peter, i'm on a mac here and the instructions seem to be for windows.
Not sure where to save the script or how to run it.
Follow the instructions in the link from Paragraphix, and once installed you can open the Scripts panel and double-click the script name to run it. For this script do it without the file open. Don't be surprised, though, if you get the same crash on a corrupt file -- you can't fix them all.
If it still crashes, you can try the tool at Repair corrupt InDesign Adobe files on Mac OS X