Forum:Level Modulation Rules

I was playing Yu-Gi-Oh world championship 2006 for the GBA and I had transferred my real deck into the game. I was having a regular duel and had an Armed Dragon LV7 in my graveyard I activated the spell card Level Modulation but it would not let me special summon Armed Dragon Lv7. Am I truly not allowed to summon Armed Dragon LV7 like this?