Hi Moon_chilD
it is not exactly what I meant.
I get in to the Jet, open the GPS Target System and set a Target for a JDAM Bomb.
After the takeoff, I go up to 2000m, fly in to the direction where I've set the target (named GPS Target or something else), lock the target by pressing the "R" or "T" button on my keyboard (could`t remember exactly), see the square, wait until the point where I see the diamond to drop the Bomb and it goes in.
And now it is not able for me to lock the next Target, although I do it exactly the same as before.
I know I have to clear the first target in the System, before I set the next one in the computer, what I always do.