Have you tried running a pingplot to the server site to see what kind of network connection you have? An inconstant net connection will cause problems with the patch. Detaisl are in the
Networking FAQ
Conversely you can download the latest installer just released a few hours ago. This version is very up to date and would require very minimal patching.
http://uk1.dl.nevrax.com/ryzom-installer_060928.exe
or
http://uk1.dl.nevrax.com/ryzom-insta...28.exe.torrent