internet sharing with firewall off

[babybird]

I am trying to hook up my Mac Mini to my mom's macbook.
Both are running OSX 10.4.11

I turned on internet sharing on my Mini and the MacBook was able to connect just fine but no internet.

When I turn my firewall off , the Macbook gets internet.

Is there a way to get the internet to the other computer without turning off the firewall?

[devo]

Go into System Preferences > Sharing and make sure Web Sharing is checked and running.

[babybird]

It has always been running on both computers

I have Personal File Sharing, Windows Sharing, and Personal Web Sharing checked

Those are also checked in the Firewall tab as well

[scooper]

I don't know if this applies to Tiger (I'm running Leopard now and the firewall stuff is different), but check out this doc from Apple.