[Plugin: NextGEN Gallery] NextGEN gallery broken image

This is confusing me! not sure if its because i have had no coffee today or i just missed an option or something i dont know!! any help is appreciated ??

ive created a gallery to put in my sidebar , simple fade between 2 images. when i add the gallery to the side bar the sideshow loads and it rotates between my 2 images then it shows a broken image link , when i right click to inspect it shows up as “undefined”

2 images are uploaded , only 2 so im not sure where this 3 element is coming from. I would post a link but i can not due to the NDA until the site is live.

HELP!