You need to add a /H hold modifier infront of the command to simulate that button being pressed down. In this section of my profile I have:
Rem
Rem Weapon Commands
Rem The trigger fires the primary weapon at the first stage and both primary and secondary at the second stage.
Rem
BTN TG1 /H Fire_Primary_Weapon
BTN TG2 /H Fire_Both
BTN S2 /H Fire_Secondary_Weapon
Rem
Take a look at my profile which you can download here (http://www.no9squadron.com/modules.php?name=Downloads&d_op=viewdownload&cid=4) You could use the macro from it to make your own joystick file if you wanted to and you'll see how I've mapped some buttons (including view controls) with this /H modifier.