Click Boxes Not Responding

Pretty difficult to know the origin, because you offer very little details. You don't tell which output you want? If it is to HTML you should have the click box on top of the Text caption, not the reverse. Good practice is to have all interactive objects on the top of the stack. For SWF output it is less important, because the interactivity will be preserved when covered with a static, non-interactive object.

However want to add a ti: do not use a click box over a text caption on each slide, but use a shape button which acts both as a button and as a text container. You have even more formatting features than for a simple text caption, but moreover you can put a shape button on the master slide, thus avoiding to have a copy on each slide. Advantage of such a button: if you check the option to have that button pausing, it will pause at the end of each slide, whatever its duration. Another solution is to put that button on the first slide, timed for the rest of the project, always on top. That second solution is better if you want to hide the shape button on some slides, because it will have an ID (name), which is not the case with objects on the master slide. More info in this article:

Why I like Shape Buttons - Captivate 6! - Captivate blog