vauxhall vectra b 2.2 sri 2001 - o/s/r kurb light not working - andy_770

hi i have a vauxhall vectra 2.2i sri petrol 2001, i have recently noticed that my drivers side rear kurb light on the door has stopped working? i have taken the bulb out of the clamps and tested the bulb and it works fine, i have also test the wiring with an electrical tester and theres no power at the bulb end so i checked the light switch which is in the door pillar not the lock and still no power, also when i open the door the interior lights come on so the switch seems ok, does any one have suggestions please many thanks