I believie it should be \rput[bl] instead of \rput[tl] --- the way it's written, the file would be placed just outside (below) the slide - and you wouldn't see it. (0,0) is at the bottom left and you want that to coincide with the bottom left of the picture that's what the bl stands for. Probably just a typo on Hendri's message, but one that would cause confusion for one not familiar with pstricks.
Thanks, you're right. Somehow I got confused with a very early pre-release version of powerdot that had the origin in de top left corner. Thanks for the keen eye and the correction. Best, -Hendri.
