Questions:
- are you using a projector to project your laptop screen to the whiteboard ?
- how far is your wiimote from your screen, and at what angle in front of it ? Have you tried different positions/distances ?
- what type of IR LED are you using in your IR pen ?
- Have you tried facing your IR pen to your wii remote while in calibration mode, and then turn on your ir pen ? What happens ?
This happened to me, and it turned out that either my IR pen is not powerful enough, or my wiimote is not positioned properly to see the IR light from the pen.
-broorb