trigger caption in views

Hi

I'm using lightbox trigger in views and I'm using my image field as the trigger. I then put [url] (the original url of the image, one of the available tokens) in the popup and get nothing. I also have tried putting the [url] in the caption and still don't get anything. I've even just put any text in the caption to see if that shows up when the lightbox pops up but I'm still unsuccessful. Any ideas on why my caption isn't showing up in the lightbox popup? Thanks in advance.