NO SOUND while playing a file

[Simac]

I am not able to play any music file .. it just shows playing but no sound comes .. what could be the possible reason. how to identify the actual problem for this. I am using ubuntu 9.10 karmic koala

ProblemType: Bug
Architecture: i386
Date: Tue Apr 20 18:03:09 2010
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/rhythmbox
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: wl
Package: rhythmbox 0.12.5-0ubuntu5.2
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: rhythmbox
Uname: Linux 2.6.31-14-generic i686

[Rickard Närström (riccetn)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We need some more information from you before we can start working on this bug.

Please include the information requested from the "Reporting Sound Bugs" section of https://wiki.ubuntu.com/DebuggingSoundProblems as separate attachments.

This information can be gathered for you automatically using the command apport-collect -p alsa-base 567221

[Pedro Villavicencio (pedro)]

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to New. Thanks again!.