Try the online scan at Trend click here which claims to be able to remove this Trojan.
You don't say which antivirus software you are using or how often you keep it up to date. I'm surprised that you are having problems though; this particular Trojan has been known about for a long time now (about 2 years) and most antivirus software should be able to deal with it without any fuss at all.
Post again with more detal and one of us will try and help further.
You might also consider posting this request in the Helproom where you might get more response to it.