When are seasons 5 & 6 of The Fresh Prince of Bel-Air coming out on DVD?, it's been forever?

does anyone know when seasons 5 & 6 of The Fresh Prince of Bel-Air are coming out on DVD?, I have seasons 1 through 4, but some how they have halted the release of the others, season 4 came out over a year ago, so whats up with 5 & 6?, are they ever gonna come out or what?, I love the Fresh Prince of Bel-Air so much, it's my favorite black sitcom ever.