Including License file into the application setup

[jassim]

I am trying to include "license key" in installation setup file for our custom app.
But it doesn't work. While installation, it doesn't throw any error.
After the installation, when checking, our product is not included the license.

here is the installation script that i used.

szProgram is "C:Somepath\LicenseActivator.exe"
szCmdLine is "ABC" our app name.

if (LaunchAppAndWait(szProgram, szCmdLine, WAIT) < 0) then
here there is no error. it passes the code.

BUT i am not getting the licensed key included to the application.
please help.