LyX/Mac 1.4.1 Not Loading Figures

[Bruce Pourciau]

Some line drawings (in eps format) which loaded just fine using LyX  
1.3.4 now do not load in 1.4.1. In LyX 1.4.1 Insert > Graphics gives  
only a graphics box that contains the (correct) name of the graphics  
file I'm trying to insert and the message "Error converting to  
loadable format." (In case it's relevant, I downloaded 1.4.1 after my  
Mac OS had been upgraded to 10.4.5. During the upgrade, my hard drive  
was replaced, but the line drawings remained untouched on the  
university server.)

Any help would be much appreciated.
Bruce