Using Masonry Gallery inside Ajax preview window

Hi

I tried using various elements within the Ajax window to varying degrees of success…
I want to use a masonry gallery but it does not display the images. However a normal gallery or a horizontal gallery DOES work…
so is there a fix for that issue? I saw an old support post saying it was not possible but perhaps there is an update on that?

http://wpg.com.gridhosted.co.uk/#asia-pacific (gallery test 4 button)

many thanks