diOxy....
It seems the opcode errors have usually come from an incompatible version of the eqgame.exe client. If you haven't, download the patcher from here, run it, and see if you still get the same problem. That client version "should" work and end your error - at least that one.
EDIT: Sorry, just caught the proxy server. Well, if you can't run the patcher you'd likely need to hope you have a friend who can patch a version of the client and send you a copy. I think that still falls under pirating legalities so I wouldn't ask anyone to post a link
In any case, I would point my finger at the wrong eqgame.exe and say that is your primary problem.