I am running a 13" macbook off of my 2.16g imac both with the airport extreme card. ADSL modem to imac the wireless to laptop

Set up was SOOOOO simple and I have got everything working with good range etc...


The only way I can check my email or visit some sites on the web is to disable the firewall on my imac, something I really don't want to do.

I have tried everything I can think of.

Any Suggestions or do I need to get a third party router??