How to make it come back ?

Hello,In FS9 I like to fly the default 737 and at first I thought I had the lights light up when the reverse thrust was engaged and anti-ice was on but I down loaded some other stuff and it no longer works. Not sure on the de-ice lights, if they were there or not but sure the reverse was. I removed the gauges file and reloaded FS9 but no luck. Thanks for your help.Scot