Forum:Why can Effect Veiler negate a Gladiator Beast's Tagging effect?

My friends were doing a duel and they asked me this question. Would and Effect Veiler used in Main Phase 1 on a Gladiator Beast negate its tagging out effect? I'm a judge at a local game store, and I assumed that Gladiator Beast would not be negated since it is in the Deck upon resolution. So just to make sure, I set up a Duel Puzzle in Yu-Gi-Oh! 5D's World Championship 2011: Over the Nexus. Gladiator Beast Bestiari in my hand, Gladiator Beast Murmillo in my Main Deck, and an Effect Veiler in my opponent's hand. Start! My Turn Mark Mares (talk • contribs) 23:28, November 9, 2011 (UTC)
 * Normal Summons Gladiator Beast Bestiari. Opponent activates Effect Veiler from his hand, negating Gladiator Beast Bestiari. I attack directly with Gladiator Beast Bestiari. Before the end of the Battle Phase, I tag out with Gladiator Beast Bestiari. The Deck shuffles, then goes straight to Main Phase 2. I didn't get to summon Gladiator Beast Murmillo. Why is that? I thought Effect Veiler only negates monster effects that resolve face-up on the field.