BOM Link Lost

I am having trouble keeping balloons linked to my BOM. In thedrawing view properties the option to link to a specific BOM isgrayed out, un-selectable. The really odd part is that this isoccuring in drawings which had the option available before so Iguess it's a System Option rather than a Document Property. I'veread through the forums and tried every possible fix I can think ofbut I'm stumped!

I'm using Premium 2009 SP0.0. Any help will be greatlyappreciated!SolidworksBill Of Materials