If it is a factory installed sunroof, the drain tubes may be clogged with leaves or other debris. If you open the panel fully, inspect the corners drains for obstructions, clean the areas as best as you can. If it's the actual seal that is leaking, I would consult a reputable glass shop for seal repair or replacement. They may also be able to adjust the glass panel for better sealing.
Friday, September 30th, 2011 AT 6:25 PM