[Roko_foko]

I would add

pawn Код:

else SendClientMessage(playerid,0xFF000000,"You are not allowed to use this command.");

before return 1;
After you do that, tell me if this message is written( maybe you are not the VIP or Admin, or maybe you misspelled the command ).
Also, "Note" from samp-wiki:

Quote:

Note: You need to create the object before attempting to attach it to a vehicle.