Shuts Down Playing iTunes
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I have an Airport Express that I use to play tunes on my stereo. Open iTunes and set to shuffle play. After about 15-20 minutes iTunes stops playing and I have to open the screen, enter my password, and start playing the same or another tune. Sometimes the computer shuts down to a point that on opening the screen it reloads programs I'm not using, as if I have re-started the computer.
In System Preferences - Energy Saver I have "Put Hard Disk To Sleep When Possible", and "Computer Sleep" and "Display Sleep" set to less than 15 minutes. I would think that when playing iTunes and the keyboard is not touched to reset the sleep clock the Mac would still continue to play, even if it goes into sleep mode with the sceen dark. I can open my internet browser and leave it alone for what seems forever and the computer goes into sleep mode but does not shut down like when using iTunes.
Any help would be appreciated.
MacBook Pro, Mac OS X (10.7.2)