Refreshing the network devices

I have a MN-700 wireless router, a Dell laptop with a
Dell 1450 Wireless a/b/g card, which was purchased 90
days ago. I have setup sharing on the printer and the
desktop, which is where the router is attached. This
leads me to my problem. In the Network Status window, in
the Microsoft Broadband Network Utility. I often have to
restart the laptop, usually many times, to get the
Network Status window to finally show my shared desktop.
Once it is able to see the desktop I can share files and
my printer. Why do I need to continually restart the
laptop to get the MS Broadband Network Utility to
finnally see the other computers on the network?

Everything else seems to be working fine as I am able to
connect my laptop to the internet wirelessly etc...