This is what i've done:
-Used olly + ODbgScript on dekaron.exe;
-Used ImpREC;
-Used PEiD.
[Like furious420 guide]
-Renamed the Dump_.exe in Dekaron.exe;
-Used Launcher and GameGuard Killer v.1222;
-Copied in bin\ the CRC folder in the PzThQy bot v1.8.
But i still have the Invalid Client issue.
Someone have any hint for me?
Thank you very much