May be the contacts on the solenoid are not making the connection.
When this happens the starter will make a click, but nothing happens.
Pop the cover off and have a look at the contacts, they are under the cover on the end of the starter, not the round cover, the funny shaped cover. If they are shot you can get a kit at the dealer.
Be sure to disconnect the battery when messing with the starter...don`t ask me how I know that....
