I don't know what more detail to give unless specified, I'm simply importing a wav, and playing it in the source and nothing is there, no waveform or anything.
Type: Windows WAVE audio file
File Size: 153 KB
Source Audio Format: 22050 Hz - compressed - Mono
Project Audio Format: 22050 Hz - 32 bit floating point - Mono
Total Duration: 00:00:13:16440
Average Data Rate: 11 KB / second
The 32 bit floating point may be the issue. PP has had trouble with 24 bit audio as well.
Try bringing that into an audio editor and resaving as 16 bit.