Call of Duty MW2 Question?

well i know that some players had this problem ( me included ) and they fixed it... but as long as there not care packages you shouldnt have a problem, i use sentry gun, harrier, and ac130 or nuke if im feeling frisky and once i get the sentry gun i usually get my harrier and that helps get the others, so i dont know why its not letting you... very wierd... and sad