sample editor exporting problem

I recorded a audio file through USB link from a YMG mixer.I can export sections of this file to my PC successfully.I used the sample editor and the cut option to remove the spaces between the songs on the original file.I have a shortened file in the sample editor window which I can hear.when I attempt to export this a large file is saved but there is no sound on it.I presume I am making some basic error.any ideas?