[HELP] Can't start the WotLK server downloads

Hi, I'm new in the whole server. I wanted to relive again playing WotLK.
I tried both downloads in the website:
First, I downloaded the WotLK new server: issue was that it was crashing when I created a BC race character (draenei, blood elf) and it crashed giving me error #132. I created a vanilla character and it did work.
Down in the forums I read it was caused by the new WoD models and I didn't know how to fix it with the current download, but it was suggested to download the WotLK (old) files.
So I did.
Downloaded the old files and, when logging in the game, a confusing in game window which says: "Your account is authorized for a Wrath of the Lich King expansion, but the computer you are playing does not contain the Wrath of the Lich King data. To play on this machine in this account you must install the Wrath of the Lich King. Additional data... (old blizzard link)" pops up.
I did download the Wrath download and currently have it in the 3.3.5a patch (which reads in the bottom left of the log in screen as 3.3.5(12340))