Windows unable to connect to the select Network.

windows is unable to connect to the select network. the network may no longer be in range. please refresh the list of available networks, and try to connect again
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"Windows is unable to connect to the selected network." The network may no longer be in range. Please refresh the list of available networks and try to connect again." Your in range of the network (right in the same room as the wireless access point). And when you refresh the list, the network still shows up there.

ANSWER:
One possibility is that the wireless network is set to use shared authentication. The Windows XP wireless service assumes that all the WAPs it detects use open authentication. With shared authentication, you have to know the key (password) set by your friend on the WAP. Here's how to configure your computer to connect to a network that uses shared authentication:

Click Start | Connect to | Show All Connections.
Double click the icon for your wireless network adapter.
Click the General tab, then click the Properties button.
Click the Wireless Networks tab.
Click the Add button.
Enter the SSID (network name) that's set in the network's WAP.
Under Network Authentication, select Shared.
Uncheck the checkbox that says "The key is provided for me automatically."
In the Network Key box, type the key set on the WAP, and type it again in the Confirm Network Key box.
Click OK.
This should allow you to connect to your the wireless network.

http://support.microsoft.com/kb/884787