Are you sure you're following the instructions I linked to exactly? NOTE: The instructions DO NOT tell you hit hit the "pair" button in the "Bluetooth keyboard" control panel. Just select "Generic 105-key PC" and then close that control panel. Then open up the "Bluetooth" control panel (under "Connectivity"). Make sure Bluetooth is on and visible; then hit the "Devices button", then hit "new", and then turn press the ctrl+fn+fn.

Sorry if this is indeed how you're going about it. I just know that it was confusing to be told NOT to hit "pair" under "bluetooth keyboard."