It points to :
C:\Documents and Settings\World of Warcraft\"
OF COURSE !! I'm so stupid i have to install addon in that Wow not the other... I'm so so stupid !
Thanks for helping, i'm going to try with that
EDIT : there are a lot of folder like
WTF.20091030-142659
WTF.20091106-181055
and the basic WTF
The same with Interface :
Interface.20091106-181055
Interface
You think i can delete everything ?