1989 Range Rover Fuel Help Plz

I Have Just Fitted A New Fuel Tank 2 My Rr And Have Put All Connections Back And Put 15 Quid Of Petrol In But It Just Turns Over It Dont Fire Up Have I Done Summit Wrong Or Not Enough Petrol Or Wot Plz Plz Help Me Thnx. Matt.
Ps Will Try And Put Some Pics Of My Rr's Up Soon If Any1 Wants 2 See Them

it sounds like you are not getting any fuel it might be something as silly as an air lock or the breather pipe is blocked, but it points to your fuel pump do you no if it works.....