I don't usually have any issues importing audio files, but I'm having issues importing some 48K 24 bit mono files into a few projects.  When I try to import this particular batch of files, Sonar goes through the process, but nothing shows up afterwards.  Do I need to adjust a setting within Sonar before importing a 48K 24 bit file?
 
The wave files open fine in Soundforge and play fine in Soundforge and Windows Media Player.
 
Any help would be appreciated.
 
Thanks.

I would guess they are imported and placed far to the right on the time line. Try unchecking "Always Import Broadcast Waves At Their Timestamp" in Preferences > File > Audio Data.

Thanks so much scook, you nailed it!