I have the exact same model, the starter motors are prone to sticking, mine normally sticks once every so often, but I have marked my starter motor now with an X so I can give it a whack to sort it out. Maybe you have a flat battery, this can cause the starter motor to click aswell, or your alternator has seen better days and is not charging the battery properly.
That the only things I can think of thats happened to mine. Its normally a very relaible car.
Hope this helps