If your appyling flaps etc then your obviously on sim mode. Bit of a cheap shot this but...
do it on arcade
rewards are the same if you do them all on arcade or sim anyway.
If you wish to carry on playing on sim though, then just get a nice line up on the runway, lower your gear and flaps, keep the plane at a low speed (but not stalling) and then bring her in gently, one she's down, just keep throttle off, then once speed is below 100 (i use 80 to be safe) pull back on the stick as if to take off. Your going slow enough not to take off but this will also keep you on the ground without your tail going arse over tit.
Well i find this works anyway, no doubt people will beg to differ.
Oh and also....
use a controller!!!! its going to be more anooying using the joystick as many of us have found out.