Do you get any dashboard lights, if so, do they fade when you try the starter?
Try putting the car in 1st gear, release the handbrake and rock the car back & forth, this would release a stuck starter motor.
See if you can rotate the engine ( out of gear, ignition off) with a spanner on the engine belt pulley nut.
Make sure you have sound/corrosion free connections at battery leads (battary end and where they fix to bodywork power connection)
Pete, January 2007