Installation Progress Dialog Cancel Isn't working for me

Hello!

I've created an install for a program that has a ton of files to be installed. It takes a long time, so I wanted to give the user the ability to abandon the installation while copying all those files.

I clicked the "Allow Installation to be Cancelled" checkbox on the Progress Dialog Properties on the Installation Progress Dialog -- but it doesn't work. It doesn't let me break out of the install halfway through copying the files and then label the installation as incomplete.

Any ideas? Is what I'm trying to do not possible?

-Dee Dreslough
dee@sportsmogul.com
www.sportsmogul.com