Live stream lost audio after several seconds with my device

Wowza Streaming Engine
1

Hi! I`m launching a stream from different computers. Everythink works well except on one of the computers.

In this case, stream is correct the first seconds, but when the first silence occurs, audio is lost and not heard again.

What could be the problem?

2

Hello again, no one knows what is happening?
My pc is a Dell Latitude with “High Definition Audio” recording device, is any other information necessary?

Thanks