What did the Mississippi Freedom Democratic Party want in the 1964 Democratic Convention? Were they successful?

also referred to as the Freedom Democratic Party, was an American political party created in 1964 as a branch of the populist Freedom Democratic organization in the state of Mississippi during the Civil Rights Movement. It was organized by African Americans and whites from Mississippi to challenge the established power of the Mississippi Democratic Party, which at the time allowed participation only by whites, when African-Americans made up 40% of the state population.