NEW : Incumbent Laurent Gbagbo votes to send up to 2,000 more troops was unanimous . Envoy : The self-declared president reneged on a promise to lift a blockade of his rival . Observers say Laurent Gbagbo won the presidential election in last week . The United Nations refuses to step down .
NEW : The United Nations votes to send 2,000 more troops was unanimous . Envoy : The self-declared president reneged on a promise to lift a blockade of his rival . Observers say Alassane Ouattara won the presidential election in November . Incumbent Laurent Gbagbo refuses to step down .