Os X Not Seeing Files Os 9 Does


I work at a newspaper and we have this odd problem that has me totaly stumped. We have a system unique to newspapers for handling photos, basically it is just a volume we look at and wait for photos to show up in. There are times when the editors will send pics and on the os x mac we do pics on we cannot see the files but if we look at the same window on an os 9 mac we can see them fine. There is nothing wrong or different with the files as compared to the ones we can see the rest of the time...I just don get it.