I encountered the same problem

[Pikachu]

I have reported that i got this "can't connect" problem http://forum.infinitymu.net/showthread.php?42349-Can-t-start-game
It was ok since then til now
But now, this problem occurs again, I tried connect many times, but the game still auto close. I tried reinstall the game, but still the same problem

 

[WolfBeast]

Disable your firewall and your anti-virus also.

 

[Pikachu]

Firewall was not enable and my laptop has no anti virus atm

 

[WolfBeast]

Try to run your client to Windows 95/2000.