Vauxhall Astra Central Locking Issues?

The central locking on my Vauxhall Astra won't work. I press the button on the key and it doesn't do anything.
The car starts ok.
When the key is removed from the ignition, the radio stays on (when it should go off) and when you open the drivers door there is a beeping sound like when you leave your lights on.

I tried to reset the car, the doors locked with the remote but once I turned the car on it stopped working again with all the problems mentioned above.

thanks in advance

Shaun
October 2010