"The File Cannot Be Found"

[madman411]

I have a rather large table in my database that contains product photos in a container field that references a secure external data source. Recently my db has been made accessible to staff over Remote Desktop and I've had no issues. Today I logged in at home through my FMP client and random photos were replaced by "The File Cannot Be Found" text. However, if I log in to the db through a remote desktop session on the server back at the office all the photos display without a problem. What is causing this???

 

I'm baffled. If they all displayed the error then I'd be able to narrow the issue down to the connection to the source being broken, but the photos that are having these problems are random.