Question : Internet Connection Sharing Problems on Wireless Network since installing XP SP2

Since installing Windows XP SP2 on my computers I am having difficulty sharing a Dial Up internet connection over my home wireless network. I am using the ASUS WL-500g WLAN Router and have set up DHCP. The internet connection sharing was working fine on thei small network before installing XP SP2. I have tried every thing I can think of and have yet to come to a solution. As far as I am aware all the pc's have hte right Gateway Settings, what I am wondering is if there might be something that may need tweaking in the router itself. If any one can help I would be very appreciative.

Answer : Internet Connection Sharing Problems on Wireless Network since installing XP SP2

XP SP2 installs and enables the firewall, have you looked at this?  So both machines have SP2 installed?  My first guess is that it is the firewall that is causing the problem.

Try turning it off as a test on both machines.