Appearently, this only is happening for a few persons. It works for me, and some other guys that downloaded it. I'll try to figure this out.
Try to download it for yourself. Thats what I did:

1. Download the Package from this Website (not from the mirror)
2. Extracting this with 7Zip
3. Downloading Map and VMap files.
4. Putting Map and VMap files into the Mangos Core Directory (Where mangosd is placed too)
5. Running MySQLD
6. Running MangosD and RealmD
-> Result: Error as I explained in my post

Greetings