Can't launch the game : Error in your GUI XML files. Check UIErrors.txt

[Krissdu64]

i got an issue with my installation, can't run the game yet... Im having this error :
"Error in your GUI XML files. Check UIErrors.txt"

My UIErrors.txt looks like this :
"[Mon Apr 16 21:31:48 2012] Warning: file EQLSUI.xml not found in directory UIFiles\default\. Attempting to use file from Default skin.
[Mon Apr 16 21:31:48 2012] Couldn't open or read UIFiles\default\EQLSUI.xml
[Mon Apr 16 21:31:48 2012] Error reading XML.
[Mon Apr 16 21:31:48 2012] Error loading skin: loading default skin instead.
[Mon Apr 16 21:31:48 2012] Warning: file EQLSUI.xml not found in directory UIFiles\default\. Attempting to use file from Default skin.
[Mon Apr 16 21:31:48 2012] Couldn't open or read UIFiles\default\EQLSUI.xml
[Mon Apr 16 21:31:48 2012] Error reading XML."

I'm on Windows XP SP-2 as an administrator. I replaced my 'default' folder a couple of times with the links i found on this website but it didnt work either.
The file is still in the folder and looks correctly written, so i think it could be some sort of permission issues, meanning the file can't be read...

Any help?