You don't have to generate a new license.
The problem is caused by a different order of the network interfaces. By adding a wireless card to your PC you have a chance thatthe wireless card comes first in the network interface list. The license server is always connected to the first network interface in this list. It doesn't help to generate a new license for the 'new' MAC address of your wireless card as then the license server will only work when your connected to a wireless network. Instead you can change the order of the network interfaces in the Windows registry (I haven't found any other way to do this besides manipulating the registry directly, no Windows commands seem to be effective).
Start aregistry editor by typing "regedit" in the Run entry field (you get this if you press the "Start" button on the taskbar and then "Run").
Now for XP (and probably Vista also) go to
My Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards
You'll see a list here e.g. 12 2 5
12 comes before 2 as only the first number is looked at, so 1 comes before 2.
Take a look which of these cards is your wireless card e.g. 12 and which of these cards is your 'fixed' network card e.g. 5
Now rename the list ( 2 -> 3, 12 -> 2, 5 -> 1)
Renaming can be done by selecting the number (12 2 5) and then pressing the F2 button.
After doing this you need to completely shutdown your machine (i.e. power off). And yes the power HAS to be off, a simple reboot won't do it as then only a warm reboot occurs and the initialization of the network cards is not done correctly.
After powering up your machine again you should see that the hostid you now get when executing ptchostid (e.g. from a command prompt) is the hostid your license server has been using before.
Be careful when manipulating the registry as you can very easily damage your Windows installation by making mistakes.
Hope this helps.
Best regards,
John Bijnens