MUI_PAGE_FINISH Not Prompting for Reboot

<DISCLAIMER>NSIS nOOb -- do be gentle!</DISCLAIMER>

I have created a simple 3rd party installer script that includes the 'SetRebootFlag true' directive at the end of one of the sections (see attached example). Whenever I run the installer with this section enabled, I am never prompted to reboot, nor is the Finish Page displayed. What have I missed?

This minimal example works as expected, try to start from here,

OutFile "Test.exe"

InstallDir "$PROGRAMFILES\Test"



!include "mui.nsh"



!insertmacro MUI_PAGE_DIRECTORY

!insertmacro MUI_PAGE_INSTFILES

!define MUI_FINISHPAGE_LINK "Visit NSIS Home Page"

!define MUI_FINISHPAGE_LINK_LOCATION "http://nsis.sf.net"

!insertmacro MUI_PAGE_FINISH



!insertmacro MUI_LANGUAGE "English"



Section 

     MessageBox MB_YESNO "Set up reboot flag??" IDNO end

     SetRebootFlag true

     

     end:

SectionEnd