What they said. Just chiming in to confirm that the file plays fine on my system even though I transposed it to several keys...after UNfreezing the tracks, since they arrived frozen.

Also, as has been mentioned...I OFTEN forget to change the key signature when creating a file. I just type in the chords..save the whole shebang but later realize I have the wrong key signature.

As noted, just change the key signature to conform to the actual key and when you are asked if you want to change the chords...say NO....then SAVE the file again.

You will end up with the original chord changes and a correct key signature.

Hope you get this sorted out.

Best,
Jim