Open Relay Problem - ugghhh!!

[wattsupwyo]

My users need my front end ex2k server to be able to relay for them in order to send email from a ridiculous program. In the properties of my virtual smtp server on the access tab -> relay button I have configured the following:

1- Selected the "only the list below" button and added my domain by range of IP's
2- de-selected the "Allow all computers which successfully authenticate to relay, regardless of the list above"

When I do a relay test at:

http://www.abuse.net/relay.html

I find that my server is relaying...ugghhh!! >:-<

From everything I've read this should work. Any ideas what I am missing?

regards

wattsupwyo