#$%^&** gadgets

So this was my third attempt to add a gadget to the gadget toolbar. And for the third time I have failed.
Adding stuff into a post is easy-peasy, but into the toolbar? Not a hope. I keep getting error messages and scripting messages and broken link messages, and so I am officially quitting. Unless someone clever out there can tell me what I'm doing wrong?
I figured at first that I was just being unlucky and picking stuff that didn't work, but I've tried at least half a dozen different ones, and none of them work.

Am open to suggestions of a technical and helpful nature ...