I seem to be having the same problem on my Blankberry Tour 9630. Audio and video streanming both work fine on the web os on my PC. But when I use the blackberry app to navigate to a file (either from the "Music" or "Video option, as well as by navigating to an .mp3 file from the drive listing) I see a screen with the album art and audio player buttons on the bottom. Blackberry seems to be showing data transfer (the arrow in the upper right of the screen shows up), but there'sno audio, and I can't seem to navigate to the buttons on the bottom of the screen either. ANyone else able to play audio through the blackberry app?

I'm having the exact same problems on my Tour 9630 .