I tried to apply my own gif to the "expanded" arrow but when clicking it shows nothing at all. I tried setting background-color as a control test and that worked fine.
The gif is currently just a plain colored square so it'd be pretty obvious to see that it's working.
Attachment shows how it looks on the page (no icons).
Where am I going wrong?
Here's my CSS:
.RadTreeView_MetroTouch .rtMinus { background-image: url('../Images/Test.gif') !important; }