Issue with 7zS.sfx/7zSD.sfx

I'm trying to create my own installer. I have my file "7zSD.sfx (incorporated" in "lzma1600.7z" - Also try it with the "7zS.sfx" file incorporated in 7z920_extra.7z.), Config.txt and File.7z.

My "Config.txt"

;!@Install@!UTF-8!
RunProgram="x64.exe"
GUIFlags="8"
GUIMode="1"
ExtractTitle=".NET Framework 3.5"
ExtractDialogText="Extracting .NET 3.5. Please wait ..."
;!@InstallEnd@!

copy /b 7zSD.sfx + Config.txt + File.7z File.exe

The problem The problem is that the executable file does not own or titles or custom texts and not know why.