a problem with norton antivirus 2006

hello,
i've just downloade Norto antivirus 2006
I've tried to get a serial number but invain
i've founf more than 15 different sereal number on the net
an' when i've put a correct one,this antivirus 's said that there is a problem with my activation key
Any one can help me?

so I want to tell some thing Dude
I think norton is worst anti virus it's to heavy and stupid
you can't with it found protect file or trojan or virus so my advaice for use kaspersky anti virus it's best anti virus I think

good luck

Okay thank u
;)