Wotlk Problem

Hello guys ,
I just downloaded the game wotlk 3.3.5 (wod models) and i have a little problem , when i start the game i always have the settings on reset like it's the first time , and i have to change the resolution and video settings every time i start the game . Any of you know where is the problem ?
Thanks .

follow these steps:
1) Restart your PC
2) close your Torrent client and move your WoW folder away from your Torrent's download destination
3) now right click on WoW folder> Properties> remove "read-only".

Thank you so much Skullatbash for your help , it worked !