Flash player can't play a .swf file alone

I've have a weird issue regarding flash.

I used Flash CS5 to create an interactive presentation. Everything works perfectly.

My problem is, for some unknown reason, everytime I try to open a stand alone .swf using flash player, the player always opens my interactive presentation instead  and tries to load the .swf INTO it. Using the finder's info window, when I do select a .swf, I get the information all my .swf have been changed to "interactive presentation files", and the default application assigned to open these files is my own presentation.

I can manually change these settings to select Flash player or Flash CS5 back as the default application for all .swf's, but as soon as I close the info window, the files immediately becomes "interactive presentation" files again, so Flash player insists in openning the fiels inside my presentation.

There's a permanent way to fix this?

I'm using a Mac Intel core duo 2.

EDIT: I temporarily solved the problem deleting all copies of my presentation's projector. The flash player atemmpted to use another presentation instead to open .swf files, so I deleted that one too. After that, now plays the .swf files as normal. The only problem is, if for any reason I do re-install any of my interactive presentations proyectors, Flash player  immediately tries to use them to play the .swf's... so the problem really remains unsolved.