Can not share internet connection with WAG354G

Right click on my network connections and click on properties.There u have ur wireless connection showing.Right click on it and click on properties.Click on advanced tab.There u have Internet connection sharing BOX.In this box u have two options.Check the first connection and click on OK button.A small window appears click on yes and ur internet sharing started.After this on the other network card use the other series of ips from the wireless connection.If any problem persist ask me.I am here for help.
Regards,
Sandeep