"Collect launch user information" doesn't works for uninstall process

Hello to everyone,
I have a setup compiled and distributed with SF9.1 that runs on this scenario :
Windows 8 Pro 64bit with two accounts :

• Tester (standard user)
• Developer (administrator user)

Now, I'm testing this setup logged as standard user.

When I execute uninstall process (from installed programs list) SessionVar %LaunchUserMyDocumentsFolder% return "C:\Users\Developer\Documents" instead "C:\Users\Tester\Documents".

The problem is that I'm installing my program in '%LaunchUserMyDocumentsFolder%\\%ProductName%' so when I execute uninstall, the process fails to load WOW64 plugin stored by the install process in "C:\Users\Tester\Documents\%ProductName%\Uninstall".

I don't know why but the uninstall process search WOW64 plugin in "C:\Users\Developer\Documents\%ProductName%\Uninstall" (administrator user) instead "C:\Users\Tester\Documents\%ProductName%\Uninstall" (launch user).

Any ideas ?