Dell TrueMobile 2300 Router and AOL 9.0

My parents bought a Dell laptop and it came with a free Dell
TrueMobile 2300 b/g router. I was suprised with the range and
security features available (WPA) they were able to get with the
router. Everything was going smoothly until I upgraded AOL from 8.0
to 9.0. First off they have a broadband connection through the cable
company but they kept AOL because they are comfortable with it. You
can get on the Internet just fine, but as soon as you start up AOL 9.0
all machines on the router loose connection to the Internet. But you
can connect to the router just fine. Is there any port forwarding
needed to be set up for AOL?

Thanks,
Mike