Which means this may not be a sound sound question. I had to say that.  Anyway,  A couple of months ago my fs9 crashed and I had to re-load.  Since, everything has worked fine except for one small thing.  I used to be able to use switches from a file called announcement.cab.  Since reloading I get a message that fs cannot load the switches, yet they are sitting there.  Don't  know what is wrong or what I need to do to fix.  Would appreciate some help.  Thanks.

Need more info. Where did the switches come from originally?

Thank you Hagar and others for responding to my question.  I will check these things out and see if I can get the sound to work.  There must be something amiss with the sound dll as when I taxi or am in the process of taking off, no matter which aircraft I am using, I get a loud sound like something dragging.  Again, thank you for the advice.