Some problem with my DirectX page and my Installing Page

[RedDesign]

Hello everyone,
I tried to make my own setup but some features are strange, I have seen that lot of people used ISDONE but with this addon I can't install one program "Izarc Extract Error...." So I want to know how can I put a progress bar with percent if I don't want to use this script/DLL.

My second problem is my DirectX page, I want to create a page for DirectX and launch DXSETUP.EXE in a new window if you agree.

Preview:

http://image.prntscr.com/image/4cd475b99cb74009998027e8659c5f6f.jpeg

I have put my .iss file in attachement but you will see that there is nothing if you click on the Yes button. LoL
Can you help me please ? :)

[lolaya]

// if RadioButton2.Checked then
// begin
// if MsgBox('If you do not have DirectX 9.0c or highter, the game will not run properly.'#13+
// +'Are you sure you do not want to install DirectX 9.0c at this time?', mbConfirmation,MB_YESNO)=IDNO then
// Result:=False
// end