How copy selection in a layer

Hello,
I would like to copy a selection in a new layer by a script-fu. But I'm a beginner in script-fu and I don't know how do it :

This is the plugin with no any copy :

;;------------------------------------
(define (script-fu-image-partietransp inImage inCalque inTransparence inColorFond inFlouOmbre inColorOmbre inDecalageOmbreX inDecalageOmbreY)

(let* (

;;PARTIE Floue
(calqueFloue (car (gimp-layer-new
inImage
(car (gimp-image-width inImage))
(car (gimp-image-height inImage))
RGB-IMAGE "floue" inTransparence NORMAL-MODE)))

;;PARTIE Ombre
(calqueOmbre (car (gimp-layer-new
inImage
(car (gimp-image-width inImage))
(car (gimp-image-height inImage))
RGBA-IMAGE "ombre" 100 NORMAL-MODE)))

;;SELECTION
(calqueVisible)
)

;;PARTIE FLOUE
(gimp-context-set-background inColorFond)
(gimp-drawable-fill calqueFloue BG-IMAGE-FILL)
(gimp-image-add-layer inImage calqueFloue 0)

;;PARTIE Ombre
(gimp-image-add-layer inImage calqueOmbre 0)

;;Remplir Ombre
(gimp-context-set-foreground inColorOmbre)
(gimp-edit-bucket-fill calqueOmbre 0 0 100 0 0 0 0)
(gimp-selection-all inImage)
(plug-in-gauss 1 inImage calqueOmbre inFlouOmbre inFlouOmbre 0)
(gimp-drawable-offset calqueOmbre TRUE 1 inDecalageOmbreX inDecalageOmbreY)

(gimp-displays-flush inImage)

)

)

(script-fu-register
"script-fu-image-partietransp" ;func name
"image transparence" ;menu label
"Ce script s'occupe de rendre floue la quasi totalité de l'image sauf
une region selectionnee au prealable." ;description
"Tobias BORA" ;author
"rien" ;copyright notice
"Mars 27, 2011" ;date created
"RGB" ;image type that the script works on
SF-IMAGE "Image" 0
SF-DRAWABLE "Calque" 0
SF-ADJUSTMENT "Transparence" '(75 0 100 1 10 1 0)
SF-COLOR "Couleur arrière plan :" '(255 255 255) ;color variable
SF-ADJUSTMENT "Flou ombre" '(30 0 100 1 10 1 0)
SF-COLOR "Couleur Ombre" '(0 0 0) ;color variable
SF-ADJUSTMENT "Décalage ombre X" '(2 -20 20 1 5 0 0)
SF-ADJUSTMENT "Décalage ombre Y" '(2 -20 20 1 5 0 0))
(script-fu-menu-register "script-fu-image-partietransp" "/Xtns/Script-Fu/Image")
;;----------------------


I tried to do this :

;;------------------------------
(define (script-fu-image-partietransp inImage inCalque inTransparence inColorFond inFlouOmbre inColorOmbre inDecalageOmbreX inDecalageOmbreY)

;;(gimp-image-undo-group-start inImage)

(let* (

;;PARTIE Floue
(calqueFloue (car (gimp-layer-new
inImage
(car (gimp-image-width inImage))
(car (gimp-image-height inImage))
RGB-IMAGE "floue" inTransparence NORMAL-MODE)))

;;PARTIE Ombre
(calqueOmbre (car (gimp-layer-new
inImage
(car (gimp-image-width inImage))
(car (gimp-image-height inImage))
RGBA-IMAGE "ombre" 100 NORMAL-MODE)))

;;SELECTION
(calqueVisible)

; (selection (car (gimp-image-get-selection inImage)))
; (calqueCopie (car (gimp-edit-copy inCalque)))

; (calqueFlottant (car (gimp-edit-paste calqueCopie FALSE)))
; (calqueVisible (car (gimp-floating-sel-anchor calqueFlottant)))

;; (gimp-edit-copy selection)
;; (selectionFlottante (car (gimp-edit-paste selection FALSE)))
;; (gimp-floating-sel-anchor floating-sel)
)

;;PARTIE FLOUE
(gimp-context-set-background inColorFond)
(gimp-drawable-fill calqueFloue BG-IMAGE-FILL)
(gimp-image-add-layer inImage calqueFloue 0)

;;PARTIE Ombre
(gimp-image-add-layer inImage calqueOmbre 0)

;;Remplir Ombre
(gimp-context-set-foreground inColorOmbre)
(gimp-edit-bucket-fill calqueOmbre 0 0 100 0 0 0 0)
(gimp-selection-all inImage)
(plug-in-gauss 1 inImage calqueOmbre inFlouOmbre inFlouOmbre 0)
(gimp-drawable-offset calqueOmbre TRUE 1 inDecalageOmbreX inDecalageOmbreY)

;;Partie Visible

(gimp-image-undo-group-start inImage)
(gimp-edit-copy inCalque)
(set! calqueVisible (car (gimp-edit-paste)))
(gimp-floating-sel-anchor(car (gimp-edit-paste calqueOmbre 0)))

; (gimp-image-add-layer inImage calqueVisible 0)

(gimp-image-delete calqueVisible)
(gimp-displays-flush inImage)
(gimp-image-undo-group-end image)
)
)

(script-fu-register
"script-fu-image-partietransp" ;func name
"image transparence" ;menu label
"Ce script s'occupe de rendre floue la quasi totalité de l'image sauf
une region selectionnee au prealable." ;description
"Tobias BORA" ;author
"rien" ;copyright notice
"Mars 27, 2011" ;date created
"RGB" ;image type that the script works on
SF-IMAGE "Image" 0
SF-DRAWABLE "Calque" 0
SF-ADJUSTMENT "Transparence" '(75 0 100 1 10 1 0)
SF-COLOR "Couleur arrière plan :" '(255 255 255) ;color variable
SF-ADJUSTMENT "Flou ombre" '(30 0 100 1 10 1 0)
SF-COLOR "Couleur Ombre" '(0 0 0) ;color variable
SF-ADJUSTMENT "Décalage ombre X" '(2 -20 20 1 5 0 0)
SF-ADJUSTMENT "Décalage ombre Y" '(2 -20 20 1 5 0 0))
(script-fu-menu-register "script-fu-image-partietransp" "/Xtns/Script-Fu/Image")

;;-------------------


But it doesn't work...

How could I copy the selection and paste it in a new layer ?

Thanks.

Tobias Bora

Important : Excuse me if I make any speeling mistakes, I'm French and my English isn't perfect...