[plt-scheme] How get enviroment

Hello plt-scheme,

  I have code
(define Z '((append-var moduleScope "x1")
 (append-var globalScope (create-var "???????"))
 (append-var moduleScope (create-var "??4"))
 (append-var globalScope (create-var "??????1")))
)
(define globalScope (create-scope "Global" null))
(let 
    ((moduleScope (create-scope "ModuleScope" globalScope)))
     (map (lambda (x)
     (eval x))
     Z)
  )
  
but on (eval x) i have error - reference to undefined identifier:
moduleScope
How I can correct this mistake?
-- 
Best regards,
 wwall                          mailto:wwall at yandex.ru