ICF not routing packets to web server

Using WinXP Pro, all critical updates installed. I have my Internet connection coming in to my Windows box on one NIC; that connection is shared and firewalled, and the other NIC is connected to a simple five-port hub. I manually configured that second connection (called "LAN") to have an IP address of 10.10.10.1, and gave my WWW & FTP server (same machine) a manually configured IP of 10.10.10.10. I set up my internal machine to have the correct DNS and gateway settings, so it can access the Internet just fine through the Shared Connection. But on the firewall, I have the ICF configured to route packets incoming on port 80 or 21 to 10.10.10.10.

Problem is, whenever I try to get to my internal webserver via my external IP, it gives me a "Connection Refused" error. This is because ICF is *dropping* all those packets, according to the log file (C:\WINDOWS\pfirewall.log). There is, in other words, not a single byte of traffic to my internal server. How can I correct this problem? Please feel free to reply via email.

Thank you very much for your time.