peakg
For starters I would download and install the latest ver SME7 RC1 and then ask for help if you still need it ... you won't get much help on a version that old.
Just for curiosity havr you got the 2 nics setup properly ... is the SME server the gateway or do you have a diff device between the SME box and the internet ... you have not got enough info for ppl to work with.
Always give a lot of info as in the setup eg:
modem <---> SME server <---> router<---> PC's etc
Also is modem in bridge mode or are you using it as a router etc.
Regards,
Tib