Demo problem

I have recently downloaded the monster hunter freedom demo to find out I could not play it. When I started the game a message comes up saying ''the game could not be started'' and then a bunch of numbers. Well i started monkeying around with the file in the game folder and in the monster hunter folder there were 3 files. The Eboot.pbp(the game) and two other files(DOCUMENT.DAT AND DOCINFO.EDAT) After removing the other files the game worked. If any are having this problem and this does not solve it, please post here for answers:)

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