This is probably too late. But here are a few suggestions:
Try switching to smog's drivers and use the troubleshooter program (
http://thetroubleshooter.home.mindspring.com/). Smog's drivers can be found on google.
If you want to switch drivers to smog's you need to go to the device manager and then click "update driver" for the EMS topgun II, then you click have disk and then point to Smog's drivers.
OR you can try my method if you are using EMS's drivers. This is what I have to do to get it working. I have the 64bit drivers, from EMS forums, which I updated a little (BTW my machine with the topguns is for sale in the B/S/T forum). I find it easier to start the machine with no guns plugged in, then I add one gun allow the system a few seconds to recognize it, then I make sure it is working and I add the second gun. This might be a pain, but for me it is the easiest way to get both guns working. I generally just need one gun so I just keep the one gun plugged in all the time.
Hope that helps
