Please make sure that the file you are trying to open is not missing from its original location.
actually i created this catalogue on my laptop - along with the entire job- it is just the one job in this catalogue - then i copied the master folder, catalogue included, to a la cie hard drive and copied it to my 27 inch iMac to work on it - both the version on the la cie and the version on the iMac have the editing grayed out - but not the original on my laptop. this has never happened before - do you think that's the problem - oops - just noticed the white flags on the thumbs - I'd better tell the catalogue where the files are now on the iMac and I should be good.
DONE! thanks for the tip!