Sound tracks inaudibl from iPhone XR... help ASAP please!!!!

I have a problem with a sound issue in DR17 STUDIO... I cannot get the sound tracks to be audible once I bring any track into the timeline. They are mute, though they exist in the sound track area and the VU levels are clearly visible in Fairlight.
Scenario:
I imported files taken from my iPhone XR. The sound and video play just fine in Windows Media player and other video players. The audio is still there and perfect when I import the files into DR17 and scroll through on the Cut Page before importing anything to the timeline....
...HOWEVER THE MOMENT I BRING ANY CLIP INTO THE TIMELINE THE AUDIO TRACKS BECOME MUST AND TOTALLY INAUDIBLE, YET THE TRACK IS THERE, SHOWS UP PERFECTLY IN FAIRLIGHT AND THE VU METERS BOUNCE AROUND NORMALLY. HOWEVER THERE IS NO AUDIO PLAYBACK AND I CANNOT FIGURE OUT WHAT HAPPENED AND HOW TO FIX IT!!!!
Help ASAP please. I'm working on a project and am coming up on deadline and am dead in the water without it.
Scenario:
I imported files taken from my iPhone XR. The sound and video play just fine in Windows Media player and other video players. The audio is still there and perfect when I import the files into DR17 and scroll through on the Cut Page before importing anything to the timeline....
...HOWEVER THE MOMENT I BRING ANY CLIP INTO THE TIMELINE THE AUDIO TRACKS BECOME MUST AND TOTALLY INAUDIBLE, YET THE TRACK IS THERE, SHOWS UP PERFECTLY IN FAIRLIGHT AND THE VU METERS BOUNCE AROUND NORMALLY. HOWEVER THERE IS NO AUDIO PLAYBACK AND I CANNOT FIGURE OUT WHAT HAPPENED AND HOW TO FIX IT!!!!
Help ASAP please. I'm working on a project and am coming up on deadline and am dead in the water without it.