Flash Actionscript problem

i need some help with actionscripts in this file.


check this fla file. and create swf then you will see the problem is with last menu item “tracking”
its working till i click on it then if i click on other items it didnt get back to normal as others do. can someone tell me what is the problem. actually i checked all over it and i didnt find anything. i think i am missing some actionscript somewhere. please help me.