Hi, Exchange 2000 SP3 with all the patches on Windows 2000 SP4 with all updates. Since last week my GFI MailEssentials (9 or 11) stopped functioning after installation of GFI MailSecurity (8.1 in VS API mode). The MailSecurity stopped the IS without the ability to restart it. Only uninstall solve the problem. I'm hanging around with GFI with no success. Any idea? Thanks, Dolly Dolly Bareqet System Manager iMDsoft Phone: +972 3 7682888 Ext. 828 Mobile: +972 544 957550 Fax: +972 3 7682880 Mail to: dolly.bareqet@xxxxxxxxxxxx Web Site: www.imd-soft.com <http://www.imd-soft.com/>