Webdav permissions

Hi all,

I've got a mini server with file sharing and webdav setup. My problem is that I can't change anything when I connect thru webdav, but if I connect thru afp I got full control.
I've checked all permissions and everything looks ok and since I can change files when connect thru afp something must be wrong with the webdav.

If I connect thru webdav I can write to the server, but I can't change anything after that.