i have a scheme question

i have created a function called "repeat" that composes a function with itself n times. i have written it in two different ways. one works and the other doesn't. can you help me understand why the one doesn't work? tia.

the code:
https://gist.github.com/3134464

>>7

yeah, just replace (compose ___F___ ___G___) with


(let ((f ___F___)
      (g ___G___))
  (lambda (x)
    (f (g x)))

wherever compose is called.