Debug it and use "try" and "catch (Exception ex)" to find the error.
11/25/2011 21:10мorιtz#5
Have you disabled the Firewall?
11/25/2011 21:14ѕрιεεи™#6
False IP?
11/26/2011 02:11Smørebrød#7
The error occurs, because the version of WarRock has changed since the private server files have been released.
But the OPC is still the same, so the handle for the packet gets useless values and the server crashes.