My laptop power supply was plugged into the outlet in the panel.
The MPI side of the adapter just stopped working. Siemens Tech Support verified that the problem was the adapter. They are investigating to see if any other complaints or returns were recieved from the batch that both my adapters came from, possibly a batch of bad components delivered to the manufacturer.. It works REALLY well when it works. I'm happy, it's so much faster than the serial adapter it's like night and day.
BTW the drivers you need come with the adapter, you get a CD with the manual and drivers on it. Enjoy!