CD Rom Autostart games function not opening the games directly

The autostart function is not working properly. When introduced a CD Rom into the drive, it has all the autostart functions for movies, pics, documents, but instead of starting the games directly, It allways ask me to open the file, movies or pics, but the game never starts automatically as It used to do in the past Windows versions, and in Windows 7 BEFORE SP1. It's imposible to play games that require the insertion of the disc into the CD Rom Drive, for the same reason. Any help will be very much appreciated. Thanks. Im running Windows 7 Ultimate x64 and have a LG Super Multi Rw\DVD +R DL Light scribe multirecorder.