Text cut off bottom of pop-up windows

I have several pages in my course that open Popup windows. Some of these windows also include links to other popup windows.

These windows all display correctly in View mode but once compiled, the second-level popup windows (using the commands

Action = Display Message

Target = Custome message Window

name = name of pop-up window

Scroll to: Top of Page)

have text that runs off the bottom of the window and no scroll bars.

Does anybody have the same problem and if so, how did you fix it?

Thanks...Dave