Just reporting that I've been trying to share my wired internet connection with my E51 via WiFi.
My XP Home laptop repots that it has formed a connection when my E51 tries to connect, but after a while my phone just gives the "No gateway reply".
I've switched off DHCP on my laptop and have manually set up my E51 with it's own IP address and I've inputted my ISP's DNS sever IP addresses. Also, I've told my laptop to be 192.168.0.1, and told my phone that it's internet gateway is 192.168.0.1.