Just installed this server and set the realmlist to "set realmlist logon.warmane.com". File is not on read-only, the whole folder isn't on read only. When I launch the game it shows Frostmorne and the bottom left version number is 3.3.5 (12340) (Release) Jun 24 2010.
It tells me "Your account is authorized for the Wrath Of the Lich King expansion, but the computer you are playing on does not contain Wrath Of the Lich King data..."
I am entering my username not my email, on the correct version with a WotLK background with nothing set to read-only.
Can you please link your lichking.mpq for me please? I had the same issue so I downloaded the file from external source. But I probably have not the right version or thefile is corrupted because wow is crashing at some places with error that it is not able to load some maps or models.
As for some things not loading, the dueling zone will crash (not sure why) and if u lower ur graphics that should be all that crashes.
And the textures missing, there are 2 additional files within the deDE folder called lichking-locale and lichking-speech, download both of those and add them to ur enUS folder.
Textures should fix with that but im still not sure how to fix the crashing in areas other than avoiding them.