Any solution for Klez Virus Outbreak?

Does anyone out there have any solutions to the Klez outbreak? Had tried with removal tools available from a few antivirus software providers but nothing been found when I scanned. Emails with virus is still propagating in my network. This virus hasbeen around circulating in my network for more than 2 weeks since it first started on the 17 April 2002.

Very much appreciate for anyone’s help!!!!