Weapons use problem in cfs2

[skaterpro0]

hello  have created a dp for my f-18, i have got everithings, when i start to play with it i go to select aircraft, i select my payload and i see my missiles appear on the plane but when i start flying i dont see them and i cant shoot with them but i can select them, can you help me

I've used downloaded weapon that come with a plane but on this other plane the weapons function

I have used DPED for creating my dp