I have a Sierra Wireless Internet Card (USB) that is connected to my desktop computer. I also have a wireless network setup, and working, in my home with a Linksys WRT54G Router. The network works perfectly with respect to connecting my computers (Dell Desktop - wired & Mac Laptop - wireless) and sharing files. The internet works perfectly on the desktop computer where it is plugged in and I have designated the internet connection as shared but for some reason the Mac Laptop cannot access the internet connection through the wireless router. I had previously set the network up with a DSL modem that was plugged directly into the router but I cannot do that this time as the AirCard is USB only. I also, eons ago, had the same type of network setup with dialup to the desktop computer and was able to share that. I've set it up exactly the same but no luck. Could someone tell me what I am doing wrong? Thanks!