i have just downloaded some aircraft e,g, tom cat amd tornado.I can't get the control pannel and some of the controls to work and the tom cat won't work at all
You have to give us exact file (zip) names or (better) a link to were you downloaded it so one of us could download and look at it.
Welcome to the forums duke3d!
I'd like to add to RadarMan's advice to also always read all of the documentation that's included in the .zip files.
Some of the Tomcats have several readme files - some dealing with the aircraft itself and others with the panel.