For some reason when I select a SID or STAR number (which I got from the Audio Briefing Codes) and then hit "P" to play the selected briefing, I get no audio :( . I think that the first 2 or 3 audio files work, but not certain since I never need those briefs; and I know the generic audio briefing does work. Any help would be greatly appreciated. Oh, and I've already downloaded/installed the 131mb update from the download page as well.

Please go into your root Fs9 folder, and go to Sounds - FS2Crew.See if you can play the briefs directly (without running flightsim) to help eliminate the source of the issue.However, your best bet is to probably update/re-install your sound drivers.However, if some of the briefs play there is no reason why the others shouldn't play as well. They're just wave files.Cheers,