iPhoto Library missing from 'switch library' window
in iPhoto 9.5 on OS10.5 I have two libraries. A work one and a personal one. I normally switch between the two either from inside the App using the switch library option in the file menu, or by holding the option key when launching iPhoto. My work library is missing from the list. The library file is still in my pictures folder where it has always been and even if I double click that, iPhoto opens my personal library and just starts importing the photos from my work library. Thus my work library will not launch and thus I can do any sort of repair on it. I'm at a loss!
MacBook Air, Mac OS X (10.5.7)