Wireless connection lost on laptop restart

[dadlad]

My laptop - Vista Premium 64-bit - connects via wireless to my desktop. All works well - I set the network properties to automatically seek the wireless network. Returning from sleep, the connection is always restored. But if I shut down and subsequently start the laptop again, or if I use the Restart featureto do the same, the connection is lost when the laptop comes back up, and the network's properties now show "<Network Name> is not in the range of this computer". I must then connect manually and reset the "automatic" property of the network.

Any suggestions?

(Using Wireless N)