I have not completet analyze your blocks
But i think u can compare it with following list
Actually this is a guide with online and offline image support too
U can check it and compare on your end what’s going wrong
Dunamic circular image list
And here we have another guide also try this and compare what’s wrong
5 dynamic list
Also try to set input of images in these lists from your image list and check the behavior if its working then there is a problem in your logic then u will be able to find that by yourself if you failed to find then we will discuss again 
One more question is other data is showing in the list???
And as @Maayur said u have to check your database
is every image link ends in. jpg or. Png or not???