Which mudfish node did you try?  Did you try to use other mudfish nodes with Full VPN mode enabled?

I actually managed to get a fix but I dont know if one day its gonna stop working.The trick is running mudfish before launching the game as opposed to when your in the character screen.You should look into it atleast Im assuming nexon korea identifies the VPN and blocks it out because the game doesnt crash it just says:game verification failed and closes the game.So it may have something to do with theyre software that detects it.

Ive used Korea azure 10 and Dognet both with and without full vpn.The method I described above only works sometimes its very inconsistent.Please help

Umm.. Not sure what's your fundamental issue.  Then did you try to change Connection Protocols to TCP based too?