Our Dell Latitude serie laptop`s do have Intel based wireless nic`s, to get them working properly we had to install the Intel Pro Wireless drivers, after the install goto installed software and choose to modify the Intel pro Wireless.
Remove all the extra crap, only leave the drivers and wireless before login.
We also disabled dhcp media sense: How to disable the Media Sensing feature for TCP/IP in Windows
Only use DDMS if you only use the wireless nic`s, if you also the LAN nic you will have a hard time getting an IP from the dhcp server.
