Slideshow does not start, no play/pause buttons

Created a gallery by adding a link to a G+ album, gallery gets shown.

However, slideshow does not start, show/play buttons are not shown.
Tested in most recent versions of Chrome/Firefox/Safari.

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Configured Lightbox V2 as follows:

interval 4sec
automatically start slideshow
automatically exit slideshow
show play/pause button

load on every page except:

admin*
imagebrowser*
img_assist*
imce*
node/add/*
node/*/edit
print/*
printpdf/*
system/ajax
system/ajax/*
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