Unless I'm mistaken, PBase doesn't allow remote linking. If that's true, you'll need to paste the URL to the page where your image is displayed at PBase into your message.
Go back to PBase, open the page where your image is, then copy the URL at the top of the page.
The image looks like a photo of a painting. If not, what was your technique to achieve such an effect. I like the photo very much. Your gallery looks great.