First, if you use Ragray, you won't ever need Sakray.
You will NEVER need Sakray anymore, if it's a non-RE server just download kRO and patch it up, everything that Sakray had is contained in the data.grf of kRO.
Did you try to patch your stuff? Use the Ragnarok.exe and Ragnarok_RE.exe and patch everything up.
It would still be interesting, which items are erroring you.
If they are custom items of the server you play, the problem lies at their client, not at kRO's