Something wrong with my spry effect slide

the warning message that I got repeatedly (from chinese) translated roughly into: "if you want this behavior to function normally, you must select the label of the content that is being slid..."

Which I did, on setup... I just chose the whole div. Also, the target content being slid has a unique name never been used.

I have no idea how I broke it, and even less idea how to fix it.

it only work the first time I added it in another webpage. however, what's strange is that when I go back to that webpage (with the working slide) and try to check behavior (double click twice to bring up the menu), it won't let me click okay, and it displayed the above warning again. yet, if i just cancel, the slide effect still works.

anyonoe give some suggestion?

edit: p.s. i can simply type the onlick thing in css, but then when I preview it, it doesn't do the effect and give me a webpage error warning