You are right on the actual ways of playing sounds. I think I should have been more specific since I don't know about how the gauge 'calls' for the click sounds. The sound stuff on the plane is handled by the sound.dll running alongside FSX and my assumption was pointing at the interaction of that dll with the system.

For example, I saw some sound related problems with another dev's B-17 and certain sound hardware. Every time the initial click was 'called', some PCs received a BSOD or just some CTD. It wasn't the actual wave file being called, but the ways of the calling.

Sounds weird  , I know, but you can call for sounds in FSX in different ways and since I saw that CS chose the dll to interact with things, I was assuming some more complex processes being involved. Hence my point on the click and perhaps some background buffer causing a CTD when being full (too fast clicks).

So my suggestion was to try some FSX runs without the sound.dll of the CS737 (one has to edit the dll.xml for this, to avoid it being loaded) and still 'hammer' that gauge with fast clicks. Here's the entry to look for.

	<Launch.Addon>
		<Name>Captain Sim 737 Sound</Name>
		<Disabled>False</Disabled>
		<Path>Captain_Sim\737\cs.sound.dll</Path>
	</Launch.Addon>