avast finds virus "knightonline.exe"

I downloaded from offical web site just minute ago but avast found virus :o
Knight Online game is very popular in Turkey.Wrong Alarm?

ScreenShot

http://img257.imageshack.us/img257/9007/dsdscg6.th.jpg

Knight Online Offical Site-http://www.knightonlineworld.com

I try downloaded it, but it’s to huge (450MB). Please send file “KinghtOnLine.exe” (false positive detected) to virus@avast.com in password protected archive (7z, zip, …). For archive use password “virus” without quotes. To subject please write “false positive”.

We take a look on it.