HOW DO I FIX MY '01 XSARA 2.0HDI???

Hi,
I have a 2001 citroen xsara 2.0 hdi 90bhp..today i went to start it and it just turns over and wont fire...i then went to try again and noticed that i couldnt hear the fuel pump working as i usually wait for it to go off...i checked the relevant fuses and disconnected and reconnected the brown relay beside the ecu as reccomended by a member of a citroen owners club...but no joy....any ideas on how to fix it??