ok , the sonner i wrote in here, faster i found the solution. i think the trick was, before taking off i waited for smoke to be also on near ready. and then take off, and waited for him to be with me all the time. after getting fuel, instead of going directly to waypoint 4 , i then go first to waypoint 3 even if the conversation tells to go waypoint 4 for training. then ruined it all that i couldnt found the bandit have to train more with the radar.