why was invader zim canceled?

So.. why was invader zim Canceled? A sentence often used by fans of the most amazing cartoon created, invader Zim. Invader Zim was canceled because Nickelodeon didn't have enough funds to support it, or views. They didn't get views because Nickelodeon couldn't find a proper schedule for the show. Causing viewers to not know when to turn on their televisions. But the show was left with one important question.. How can they not support everyone's favorite cartoon but spend all their money on the KCA?