Have a look at this sticky thread for information on how to install your addons and some common mistakes when installing:
http://www.wowinterface.com/forums/s...ad.php?t=14762
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff,
The Tao of Pooh