I used to have an office next to an Electrician and he used to go mad at the word 'bulb'.
'Bulbs get planted in the ground and become plants and flowers! Lamps are the things that light up.' was his stock comment.
Sounds to me as if you must have the wrong bulb, or a defective one. Worst comes to worst, you could replace the light socket for one with a better range of lengths that it'll spring up to connect to.