is your application not executeable? Is there a broken arrow? Which LV Version do you use?
i think the problem is like you has described, the selected sound device is not available on the other pc. Part from my LabVIEW Help:
"In general, most users should select the default value of 0. This value is ignored on Mac OS. The value ranges from 0 to n–1, where n is the number of input devices on the computer. You can use the Call Library Function Node to call Windows API functions to query the number of input or output devices on the computer and the capacity of each device. "
To solve the problem you should select the device at runtime.