Cannot change cursor ID

[Simon Lord]

Running on OS X and will default to Shao's external if I can't sort this out...

I have a non-animated gif with transparency sized to 16x16 as per the
documentation and I can get the cursor to use this image as a cursor.

set the cursor to 1021

Using the image name (as per the docs) simply spits out an error.
Using the ID does nothing.  Searching the archives seems to point out
I'm not the first to have problems but I have yet to come across a
posting that had a solution.

I could always set the cursor to none and just have an image follow
the mouse but would like to avoid that scenario if possible.