Updating iLife '11 (DVD) in Mountain Lion Mac App Store

I've got an early-2011 MacBook Pro with Mac OS X 10.6.8 pre-installed with iLife '11 DVD bundled. After over a year, I clean-installed OS X 10.8 Mountain Lion then installed the iLife '11 apps. I installed everything except iWeb. I couldn't find the updates for these apps. I tried the App Store then selecting the Updates tab as well as by going to the Apple menu then Software Update.. After a few minutes, it only shows the update for iDVD 7.1.2 but none of the other apps like iPhoto which was I checked was from the 9.1.1 version.

Notes:

-When installing iLife '11 apps from the DVD in Mountain Lion, it has a certificate security 'warning' but I dismissed it and installed anyway. Everything seems fine but I want the latest updates for my apps.

-Version numbers of the apps installed (not-updated): iPhoto 9.1.1, iMovie 9.0.2, GarageBand 6.0.1.

Thank you for an immediate reply!