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“Application Key Not Allowed” in Sony Media Manager.

This usually happens when trying to transfer files to my PSP® System using the Media Manager for PSP® software. When transferring files to the PSP® System, certain video files can present this error message. To fix this problem, simply download the following patch and install it: http://download.sonymediasoftware.com/patches/mm4psppatch_enu.exe

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