Please Help

I just recorded a two track song and it sounded great and clear... But then I emailed it to myself to send to friends and When I played the exported one in the email it was crackly/staticky throughout.why is that?? And it was like that when I was sending it via sms messgae to people too.

TrainBoyTylerElliott about Multi Track Song Recorder, v3.0.5