DV 2009, Countries which are not eligible.

Natives of the following countries are not allowed to participate in the DV 2009 lottery.

They are Brazil, Canada, China (Mainland-Born), Colombia, Dominican Republic, Ecuador, El Salvador, Guatemala, Haiti, India, Jamaica, Mexico, Pakistan, Philippines, Peru, Poland, Russia, South Korea, UK (except Northern Ireland) and its dependent territories, and Vietnam.

It is because these countries have sent more than 50,000 legal immigrants within the last 5 years period to The USA. Although they can claim nativity of their spouse eligibility country if they married to a person who's country is eligible. Please read the Stare dept instructions for further clarification.