can I delete the background of the clipart?

[cha]

I download the flower picture from web. I use it to do my scrapbook .Open it by photoshop and photoscape. I drag the flower pictue to patch on my page and only flower ( not the white background) come. But when i try to drag it over the page to do my photobook ( use myphotobook programe from photobook shop) the flower come with the white background ( not tranparency background). Why it occur? Can i do something to get the flower with tranparency background(not white background)? I try to ask the photobookshop programmer but he can't correct it.