MP830 Scanner button problem on XP


I have lost my MP830 scanner CD and downloaded the software from Canon site and reinstalled. But since then the "Scan" button on the printer doesn't seem to work. When I press the "Scan" and select "Save to PC" or similar from the LCD, it used to initiate the scanner software on the PC and start scanning automatically.

Does anybody have the same problem with the software from the Canon site? It seems to me that the software on the Canon site is not complete.

Does anybody here have the full MP830 installation CD?