I know you have run the wizard, but is ICS set up on the correct connection, which should be the ethernet adapter that connects to your Cable Modem? When you enabled this, it should have configured the Wireless Adapter automatically with the fixed IP address of 192.168.0.1 and Subnet Mask 255.255.255.0
The laptop should be set to get its IP address automatically which it does by DHCP from the "host" PC. Is it configured this way and does it have an address in the 192.168.0.x range? Windows Internet Connection Sharing tends no to like "client" PCs being given fixed IP addresses.