racket - (scheme) can define a function but can't call it -

i trying write function calls map function n times on list. pretty simple problem:

(define (mapntimes f x l)   (if (= x 0)         l         (mapntimes (f (- x 1) map (f l)))))

dr racket gives me following error when try , call function. using statement this:

(mapntimes ((lambda (x) (* 2 x))) 2 '(1 2 3))

it gives me error

    expected: number?     given: '(3 5 1)     argument position: 2nd     other arguments...:     2

i know syntax can't life of me figure out is. appreciate help.

perhaps new scheme , not familiar syntax invoking scheme functions.

given function f, invoke using:

(f arg1 arg2)

not

f (arg1 arg2)

this works me.

(define (mapntimes f x l)   (if (= x 0) l     (mapntimes f (- x 1) (map f l))))

Brazzel