Kneepads of Allure and Direct to Video Sequel For Winning Level

So here's what happened. I was at Level 6. Another munchkin was at Level 9. I fought Level 20 Hercules (2 level monster). I used the Kneepads of Allure to make him help me and we defeated that monster. I am now Level 8. The other munchkin then played Direct-To-Video Sequel which made the monster reappear. The card says "Those characters who survived the first battle must face the monsters again." So that munchkin was now in the combat with me again. The Kneepads however, say "You cannot gain the winning level in combat where your helper was COMPELLED by the Kneepads." My argument was that he wasn't compelled to join the combat from the kneepads, but from the direct-to-video sequel. So essentially, he was helping me for the winning level and I should have won the game.

Kneepads of Allure and Direct to Video Sequel For Winning Level