HOW To restrict movement of object via curve ?

Hello !!

I want to make an animation where the camera flies abopve the text and the text rises up to the camera.

I created the curve and the text.

I want this:
When the curve is far the text should lay and when the curve (its origin) touches the text it should move on this curve as its made. When the curve moves forward the text comes to its end it shuld lay as in the beginning.

I have this:
Text is somewhere in the space and it moves with the curve. When curve passes the text it still moves going down and down …

How to restrict the movement of the text on the curve ?

Here is my .blend
http://www.pasteall.org/blend/32897