I'm styling a WebCalendar to match the theme of my application.  As soon as I set UseDefaultStyle="false" the calendar buttons (next and previous) turned into broken images (see attached image.)

I set the ImagesDirectory property to the correct location and put the next and previous image file names into the ImagesSettings section for each of Black, Blue and Green.  Nothing seems to make a difference though, the images never come up.

Is there a correct format for the images folder name that I'm missing?  I've tried all combinations of slash or no slash on either side, or the tilde character which is sometimes used in ASP.NET.  I've double checked all filenames and locations, and even matched the casing just in case.  What should I try next?

Thanks!