i want to help but i dont know what to say ahahah..i dont encounter that kind of problem since i play infinity? close your antivirus and try to re install the client
1.Is there any web browser opens while you are trying to login ingame? If yes, then this is a muguard warning. You need to send llahlog.dat file from your client/muguard folder.
2. Is there any errors? If yes: What kind of error? Can you take SS?