internet access using airport on ibook G3 using OS 9.2.1 u..

I am hooked up to dsl using an ibook G3 on OS 9.2.1 that is set up as
an airport base station. I am trying to access internet through the
ibook sending to another Ibook G4 with OS X and airport extreme. The
connection is showing on the G4 but I am not reciving internet access
from the G3. It actually worked at one time but that was when the
system was from OS9 going to OSx. I had to upgrade the sys to 9.2.1
sending to OS x and have not been able to make internet work since.