Bookmark and its properties

Hi,

   I have created bookmark in pdf with multiple levels.  After run the script the bookmark properties shown as below.

But I want to set the properties as the below image.

Code :

tell application "Adobe Acrobat Pro"

    tell active doc

        set pgNo to 3

        set cont to "TEST CONTENTS"

        set CNT to count of bookmarks

        set JsScript to "var gotoPg =" & pgNo& ";var bmarkConts = \"" & cont & "\";var root = this.bookmarkRoot;root.createChild(bmarkConts , \"this.pageNum=\" + gotoPg ," & CNT - 1 & ");"

    end tell

    set res to do script JsScript   

end tell

Whats wrong in my code?? Can anyone help me...

Thanks in Advance,

Sudha K