My transit 2.4 duratorque wont start?

after a front end bump my 2000 ford transit van was running ok, i quickly turned engine off, and now repaired it fails to turn over (starter is fine all wiring seems fine earth straps fine, fuses look ok inc battery one) it wont bump off either, but i have noticed the immoboliser light is not flashing with or without key, everything works fine lights, horn, radio,wipers etc etc confused please help