Help!!! Wavefile visable but no sound only on the one file

I was in the process of increasing the decibel level on a portion of my file.  In the process, I accidentally clicked some thing and I don't know what. Now when I hit play it scrolls through my way file which is visible, but there is no audio and the decibel level display does not show any decibels being played.  It is only happening on the one file that I was editing at the time. All other files are playing correctly.  I am praying that there is a way to bring this back. Please let me know so that I can get this episode released. Thank you in advance for everybody's help.