Hi,
· Were you able to use this feature before on the system without any issues?
· What is the model of the system and who is the manufacturer?
Method 1:
It seems that you need to update the drivers for the sound card. I would suggest you to update the drivers from the manufacturer’s website and check whether the issue is resolved. Check the link mentioned below.
How to manage devices in Windows XP
http://support.microsoft.com/kb/283658
Method 2:
I would suggest you to update DirectX on the system and check whether the issue is resolved. Download DirectX from the link mentioned below and then install it on the system.
DirectX End-User Runtime Web Installer
I would suggest you to refer the article mentioned below.
Microsoft DirectX to Feature Real-Time Voice Technology
http://www.microsoft.com/presspass/press/2000/feb00/directvoicepr.mspx
Thank you and Regards.
Thahaseena M
Microsoft Answers Support Engineer.