Google Maps….Help

Google maps seems like such a simple thing to do. I watched the video that pops up when you first sign in. Wow it looks simple. I am sure it is simple, but I this is my first go around. I am sure I will blog about this more but this is my asking for help post. My pictures wont show up on the pins. I am using the url from my Flickr account on the rich text formatting like the video showed to do this. A box shows up but it has that red X in it. I don’t know what else to try?