Heroes IV, Winds of War. Campaign HELP

[Xquil]

Hello!

I can not get through the map in campaign where u have to "defeat red player and convince the megadragon king to help you"

I need a Dragon Scale Armor and a Dragon Scale Shield to convince the megadragon king to help me and then ill win the game

I can not get the Dragon Scale Shield i got the Armor in some fighting with the red player..

Plz. help me....

THX!