CM7 music playback issue

[deesto]

In CM7 v7.1.1 on HTC Thunderbolt, when I open the default Music app and try to play a file (MP3, etc.), the play button turns into a pause button, but the progress bar never goes past 0, and the audio never plays. I haven't found many references to this, only some nightly posts a few months ago that I assume were fixed in later versions. I've also downloaded another audio player, Winamp, and it does the same exact thing. Any ideas on how to troubleshoot?