Camera Path Problem...

In one of the projects I’m doing, I set up the camera to follow a bezier curve, from the constraints pane.

The camera does move from one end of the curve to the other, but it starts at the wrong end. Instead of going from A to B, it goes from B to A.
Is there any way to fix that?

Yes There is:
“If when following a path the dashed line between the object and path goes to the wrong end of the path simply clear the parent, select the path and go into edit mode. Select all the control points and select, in the Curve Menu, segments and select switch direction, then reparent the object to the path.”
For the complete tutorial go here:
http://mediawiki.blender.org/index.php/Manual/PartVII/Following_a_Path