Thanks for the information, Just to let you know about allowing our ISP into our servers. We are a School and the local Council need access to the admin side of the school for payroll and stuff so they asign us a 172.20.x.x range of IP addresses. And to protect ourselves I installed a ISA server to allow us to have our own IP address ranges (172.16.x.x). which stopped a virus spreading to us from the council last year (something called blaster??? -LOL). Anyway thanks for the advice Andrew