Reply to Mix Recorder Issue

Hey all!!

Last evening I recorded a one hour mix of Electro/House/etc, not really important, but when I hit the stop record button and closed Traktor I went to go preview the mix and put it on a thumb drive, but when I went to play it back (I am on a Mac) instead of showing up as the black icon with two eighth notes on it it showed up as a white sheet of paper with a boxed corner and will not open.

Anyone else run in to this?