jquery - Dynatree Lazy Load Not Working -

i'm creating dynatree , loading same data provided in example:

http://wwwendt.de/tech/dynatree/doc/sample-lazy.html

only lazy node (sub-item 2.3 (lazy)) not show expandable, , onlazyread() never fires.

$("#tree").dynatree({     title: "lazy loading sample",     autofocus: false,     initajax: {         url: "sample-data3.json"     },     onlazyread: function(node){         console.log("lazy");     } }); 

the data:

http://wwwendt.de/tech/dynatree/doc/sample-data3.json

is exact same data example page loads. lazy node looks this:

{"title": "sub-item 2.3 (lazy)", "islazy": true } 

but no expand icon showing:

any ideas?

the issue had custom icons.gif file missing lazy load icons.