Forum:Dimensional Prison and Level Down!?

Why was my Horus the Black Flame Dragon LV6 removed from play when my opponent activates Dimensional Prison and I chained Level Down!? ? I had Horus the Black Flame Dragon LV4 in my Graveyard. These are in the same Spell Speed so why didn't it work? It happened in YGO WC 2008. Gaben90 20:53, 21 August 2008 (UTC)