Walkthrough tips, Discussion of Campaigns [Heroes 5]

Guys, please help! I understand that this question has been asked many times, but I can't solve the problem.
Campaign 5, Elves, mission 1. I cleared all the monsters from my territory. I'm stationed in the middle garrison; the others are empty, except for one where the initial army is located. I emptied my castle. I pressed Enter for 2 months, but no hero from Inferno arrived... I have two scenarios: 1) I killed the main hero (Necromancer) when he was near the garrison; after that, no one attacked; 2) he's still alive, but nothing happens anyway :(( I don't know what to do; it's a terrible bug that ruins the whole experience... I have a licensed version (DVD disc) + patch 1.1.
Help, please!