Wrap Text option prevents entire text box from displaying

I am having some trouble with a set of rollovers and text wrapping...

I have 6 little pictures with 6 transparent buttons on top.

When you rollover one of the little pictures, a big version of the picture should appear, to the right of a text box with more information about the picture you've rolled over. Each big picture + relevant text box appears in the same space on the page, but only one set at a time.

So each rollover button has 4 actions:

OnMouseEnterShowBigPicture

OnMouseEnterShowRelevantText

OnMouseExitHideBigPicture

OnMouseExitHideRelevantText

Okay, so here's where it gets strange...

All of the big pictures show/hide just fine.

Only the text box on top of the stack of text boxes will ever appear.

If I put a different text box on top, that one will show, but none of the others will.

All of the text boxes have the "Wrap Text" option selected, because they should wrap around the big picture that appears to the right.

BUT, when I uncheck the Wrap Text option, all of the text boxes will show/hide as expected, except (of course) that the text doesn't wrap, so some of it is behind the picture and you can't read the whole thing.

I've tried putting the big pictures behind their corresponding text boxes, no change.

Summary: If the Wrap Text option is selected, only the top text box ever appears. Is there a reason for that, or is there a setting I've missed?

Thanks very much.