I am attempting to play tracks within a project "Rock Album".  I click the arrow on the left, and the gray line progresses through the track, but the track doesn't play.  I attempted to play a track from another project, and the same thing happened.

Does the vertical orange progress bar move forward (after the horizontal grey line begins)?

No, it didn't move at all, but it is working fine now!  Thank you.

I am again having the same problem I did yesterday. 

Hmm, it's working OK for me (and I'm currently 30,000 feet somewhere over Arizona, I think).

Come on, admit it...you are flying in a UFO!

30,000 feet up somewhere between Chicago & Albuquerque, wifi a little slow up here :)

Attemped to play tracks for different projects.  Same result.  What, in my computer, could be causing this?

Which browser are you using?  Version?  Windows or Mac?  How are you connecting? 

I think I had a problem with one of my audio drivers.  I did a diagnostic and it seems to be working now.  Thank you for the quick reply.  Hope you are enjoying your flight.  Great pics!

Super.

Finally we have hard evidence that someone is up above watching over us at all times....

Come to think of it, the "LUV" police are always up there looking down :)

IE9

http://www.kompoz.com/compose-collaborate/list.track.project?projectId=31570

If I click on my "Ideas" track from the tracklist it plays someone elses track. If I open my Ideas track and hit play it plays my track.

Lonnie