Did you find a solution as i also have the same problem!
Wow, this is a serious problem!
I have searched and searched the Microsoft site and no support whatsoever!
I have tried both wired and wireless connectivity to my NAS and nothing!!
The message i get is either network error (1208)...
I have an Atheros AR5007 WLAN NIC in my laptop i have just build Windows 7 on!
When i try to connect to my NAS i get 'network error (1208)'!
I have tried every driver available from the Atheros website and the unofficial Atheros.cz website and get the same happen no matter what version is...