SBS 2003, IP Routing Problem

Hi All,

I have a little problem. Installed sbs2003, and everything works fine. But when someone tries to access www.companywebsite.com point to the default gateway address which is the ADSL modem. Externally this is fine, anyone can see the website. But internally noone can view the company website. I have tried forwarding the needed ports however nothing has worked so far. I would really appreciate if anyone can give me a solution for this.

Regards,
Posh