Chiclet slicer have the problem with the file names containing space. So if you replace the spaces between file name into %20 then it will work for you.
For example
if you have a link like
http://contoso.com/my image.jpg
then replace it to
http://contoso.com/my%20image.jpg
I would suggest replace all spaces containing in url with %20
Hope that helps
Kaushal