Monetization for your YouTube channel can be disabled due to several reasons. Here's more about it and what to do if it was an error: http://yt.be/help/Be9A . Hope this helps.
@TeamYouTube Dear team youtube i have completed 4k hours and 1k subscriber in 365 days,but i can't enable monetization ,and monetization has been disabled on channel,so please guide us,,
https://www.youtube.com/features?o=U pic.twitter.com/yQo25GutSW
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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