How did I do that???

How is this possible that I have posted a slideshow before on the webpage yet now when I want to add another slideshow I can't?!? How did I do that? Surely I copy and pasted the url right? Maybe it is my computer because it won't let me copy and paste into this little compose thing. Hmmm....I am going to have to figure this one out. I can't even paste a link to the album...crazy blogger.