Need help with add-on police car

Hello everyone. I am having problems getting add-on cop cars working on my server. I downloaded the Porsche off here and it worked flawlessly. The lights and sirens both worked with no problem. Now i’m trying to add a 2015 mustang (here’s the link to it http://www.lcpdfr.com/files/file/13064-2015-police-liberty-walk-mustang-gt-addon/ ) and the car will show up in game but the lights and sirens wont work at all. Everything is installed correctly but the lights just will not work. Any help would be greatly appreciated

I second help for this