http://forum.forsaken-ro.net/index.php?showtopic=2954
This is the Valhalla Client Patcher. Extract this to the folder where you installed kRO/Sak, and use it to update the two clients.
1. Click on the Valhalla Client Updater
2. Select which one would you like to update, KRO or Sakray?
3. Click on "ok", then click "download".
4. When the patcher is finished updating the client, then update the other one.
5. After you finished updating both, then install your ForsakenRO Patcher.
That should eliminate errors. At least, thats what I did with mine and it works fine.