Zanussi FX1465w wont start?

When attempting to start my Zanussi FX1465w I get 4 beeps and 4 flashes. The manual tells me that its the door that's not shut. It is, so I have replaced the door contact switch but that hasn't solved the problem. There is a light that's part of the door assembly and that's not lit. I've checked the usual stuff (Filter, water supply, brushes etc). When I reset the m/c I get 3 loud clicks then the error comes up