Panoramio Data API does not return photo data

I tried to get JSON from this url and it returns count = 4

but no photo array is returned? No matter what values from

and to

installed.

If count 4

, then from

maybe no more 3

to the right? (0, 1, 2, 3, that's 4 pictures) Or how does it work? Why didn't he return the photos?

Also, same problem: for one area I got count = 662

, but it won't return an array of photos if I set from

more than 56

.