Hi, OK, I've found what is going wrong. I'm not using Visual Studio (other IDE's) hence not VisualSVN plugin which I'm not familiar to. Hence, I tried to do it on VisualSVN Server. That's why the menus I was checking appeared totally different. So anyone who desires to set svn:needs-lock should try to apply the instructions on Visual Studio's VisualSVN plugin.
Regards. Caner
