On the first install, make sure the upgrade code and the product code are setup. The upgrade code should never change again as long as you want to upgrade your application. Each time you want to upgrade your app you need to change both the prodcut id and the version under the general group. If you don't change the product code it will ask to uninstall your app.

Hope this helps.

>James:
>
>I followed all your steps but I still get the same message asking me to uninstall the previous version.
>
>To do my test, I uninstalled the original application, then I installed the main application then I installed the upgrade. The upgrade had unique version numbers and product codes and the version numbers in the different sections of Group 1 matched.
>
>I had also set the feature "Ignore Remove Failure" to YES in hopes that it would let me bypass the Uninstall message. But the question comes up in the form "Please uninstall the previous installation. ". It does not give , options.
>
>I have Install Shield Express which is not supported by Install Shield. All my past contacts with them have been oriented to upgrading to a more stable version for $500 to $2500. I don't think so. I think I will use ISE for installing new applications and other tools like Inno Setup for installing upgrades.
>
>Thanks for your help.
>
>Mike Smith