The P200 expects a workout program to be on a USB key in a file named userdata.xml.
If you are experiencing trouble with your data key, this check will help rule out the possibility that your workout program file is misnamed.
Step 1:
Navigate to the USB key and select the XML file named userdata (userdata.xml).
Step 2:
In an effort to be "friendly", some operating systems hide the .xml extension, making it hard to tell if the file is correctly named.