masotsha
That is a package that dungog sold, & with the access code you were issued after paying your money, you could then install using a dungog repository. As far as I know, dungog is no longer in business. Also AFAIK Dungog sent all public code to contribs.org but that did not include dungog commercial packages.
Instead you can use the contribs.org version smeserver-dansguardian, it does not have a GUI server manager panel though, but is relatively easy to setup using the command line. Instructions are in the Howto.
Only the SME8 version is available, not yet updated for sme9 but the SME8 version might work OK on SME9, try it & let us know, & post a bug report if you have any problems, so they can get fixed.