|I had the same problem. "No wireless network in range" I don't have a router.|
You will have to assign each computer with an IP address 192.168.0.1 and 192.168.0.3 respectively.
If you are using D-Link Wireless Utility give your SSID a name - eg HOME. Wireless mode set to Ad-Hoc.
The best thing I did was to phone D-Link and they guided me through the process.
Check your firewall settings and make sure that ICS (Internet Connection Sharing) is allowed and that any program on your laptop that you want to allow to connect to the internet is allowed to connect and is not being blocked.
Again try calling your Security software company for help. It does save a lot of hassle.