Sound problems

Evening everyone,

The only problem I have on FM09 is that every so often my sound box keeps 'unticking' itself in the preferences screen. It seems to only happen when I load the game or if I leave the game unattended and not being used (but loaded) for any length of time.

I can then at anytime go in and tick it and it then works fine unitl the next time I leave it dormant.

Very strange - anyone else have this problem and solved it or anyone knows how to fix it.

Thanks