Hi Renee, Welcome to Feathered Friends!
That is very cool that you have a Prothonotary Warbler nesting in a nestbox - I had no idea this bird would nest in a nestbox! I was also unfamiliar with that type of bluebird house so thanks for sharing it.
In order to get your pictures to show up, you need to copy and paste the Direct Link from Photobucket. I can see your pictures when I copy and pasted the domain site, but I cannot access your Photobucket account. Technically speaking, the HTML and IMG code works too, but you will have that IMG showing in your picture so Direct Link works best.