That 3d thing

[1micha.elok]

Here's step 6. ...

STEP 6. What if the enemy can shoot you ?

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Enemy shoots randomly, the bullet goes at the same direction as the enemy movement.

click image to zoom in
   
When the enemy moves toward you, they begin to shoot you.
Question : 
    How to use collision detection function when the enemy's bullet hit you at certain area ?
    Mine is still error .... 

You may answer when you have free time, don't worry, it's not urgent 

Code:

'----------------
' INITIALIZATION
'----------------
...
constant ENEMY_BULLET_ID    = 8
vEnemyBulletImage = loadimage("assets6/enemy_bullet.png",4,1)
...


'-----------
' GAME LOOP
'-----------
EA_Run()


'-----------
' FUNCTIONS
'-----------
function CreatePumpkinEnemy(x, y, z)
    enemy = EA_Object()
    enemy.id = PUMPKIN_ID
    ...
    enemy.Update = function(dt)
        .stimer = max(.stimer - dt, 0)
        if .stimer = 0
            .stimer = 0.5
            EA_AddObject(CreateEnemyBullet(
                    ENEMY_BULLET_ID,
                    vEnemyBulletImage,
                    .X() + .DX()*0.2, .Y() - 0.3 + .DY()*0.2, .Z() + .DZ()*0.2,
                    .DX()*4, .DY()*4, .DZ()*4))
        endif       
    ...
    endfunc
    ...
endfunc


function CreateEnemyBullet(id, img, x, y, z, dx, dy, dz)
    b = EA_Object()
    b.id = id
    b.SetPos(x, y, z)
    b.SetSprite(img, 0, false)
    b.SetHeight(height(img)/64)
    b.SetRadius(0.5*width(img)/64)
    b.dx = dx
    b.dy = dy
    b.dz = dz
    b.numCels = cels(img)
    b.cel = 0
    b.Update = function(dt)
        if .numCels > 1
            .cel = (.cel + dt*30)%.numCels
            .SetCel(int(.cel))
        endif
        res = .Move(.dx*dt, .dy*dt, .dz*dt, 0)
        if res.any
            EA_RemoveObject(this)
        else
            'Error collision detection enemy bullet and player
            'if .CollidesWith(PLAYER_ID)
            '    EA_RemoveObject(PLAYER_ID)    'remove player
            'endif
        endif
    endfunc

    return b
endfunc