Fly mode zoom problem

Hallo everybody, I’m Paolo from Italy and I’m new on this forum.
I have recently installed the last version 2.72b; and this problem occurs when I go in fly mode (shift f) the scroll doesn’t work and the camera not zoomming on object. With 2.65 version I have not problem.
Please can you help me.
Thank you in advanvce and sorry if my english is not good

Blender now defaults to Walk Mode, see:

Thank you so much. This is very helpful