Probably you can install the latest audio driver to check the problem.
ASUS driver download website.
http://support.asus.com/download/download.aspx?SLanguage=EN

If you still have the same problem, you can provide following info to support team.

1. Dxdiag.txt.
2. A screen shot of the error message.



PS:
1. The steps to capture the screen shot.
(1) Press the Print Screen key on your keyboard when the error displays on your screen.
(2) Click on Start -> Programs-> Accessories-> Paint.
(3) Paste the screen capture there by pressing Ctrl+V
(4) Save the file with the extension name .jpg and send to CyberLink Support for analysis.
2. The steps generate the DxDiag.txt
(1) For Windows Vista:
Start -> All Programs -> Accessories ->Run
For Windows XP:
Start -> Run
(2) Type in DXDIAG and press Enter or click OK, this will open the DirectX diagnostic tool.
(3) Click on the Save All Information Button (save this file to your windows desktop and name it dxdiag).

English Support:
http://www.cyberlink.com/prog/support/cs/service/technical-support.do