Error when opeing QuickTime 7

Hey guys so I just downloaded Quictime 7 to my Feb 2011 MacBook Pro bec I have QuickTime pro registration and I wan't to be able to edit my movie files on there but eveytime I try and open it I keep getting an error syaing that quicktime could not open...the only thing I can think of is that my machine came with quicktime x already instaled, do I need to delete that first before I can open it and how do I delete it or is there something else wrong??
Thanks in advance,
Ray

The two can coexit. I have both on my machine. But the quicktime players are just that, players. You don't edit videos with them.
As for your problem. Not sure.
FWIW there are two plist's (preferences) assoiciated with Quicktime 7:
~/Library/Preferences/com.apple.quicktimeplayer.plist
/Library/Preferences/com.apple.QuickTime.plist
The first in your home directory are the preferences for Quicktime7 and the one second should contain your your pro registration when you register it.
Quicktime (X) only has a single plist:
~/Library/Preferences/com.apple.QuickTimePlayerX.plist

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Found the solution! Hooray!
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I'd really like to hook up my new ipod but thats standing in my way. Help?

hi RoxBury!
the -3 indicates an unspecified problem with the QT component of the itunes installer bundle. to get some more information about what might be causing the -3 in your particular case we need to try a standalone QT 7.1 install. (this might possibly get us past the -3 all on its lonesome, too.)
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Error when opening quicktime player

hi,
i get this error when i try to open quicktime player.
[IMG]http://img.photobucket.com/albums/v316/irishking/quicktime.jpg[/IMG]

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Hi all,
I am using the most recent version of quicktime so 7.3.1, if I select update from the menu of quicktime player it loads to the following error:
Microsoft Visual C++ Runtime Library (Error message window header)
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Could not open key: HKEYLOCALMACHINE\Software\Classes\QuickTimePlayerLib.QuickTimePlayerApp\CLSID. Verify that you have sufficent access to that key, or contact your support personnel
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