msi installer does not prompt user on upgrade

Question

I have a simple msi installer setup.exe (created via VS2010).In the first installation everything is OK,The problem is in the second installation : 1.The msi settings are : a.RemovePreviousVersions is set to TRUE. 2.I upgraded the setup version(for the second installation) number and then pressed OK when i asked if i want to upgrade the product code.

At this point i recompiled the msi and double clicked on setup.exe. The problem: I expect that the installer will detect that there is already previous version installed and ask me if i want to remove\upgrade it. what happens is that the installer automatically upgrades the installed product to the new version without asking anything...

Is there any way to configure the msi project in order for it to prompt the "Upgrade\Remove" screen ????

Many thanks..