Siren not working

[nfspdf]

My siren not working on Crash time 3 .It seam really odd It sound fine when I test it in the file.So has anyone have this problem .I was going to reinstall the game but I can't find it on my uninstall on my computer .Could someone help me it is driving me crazy . How to find it so I can uninstall it .Or a siren file Thanks for your help .
Chris