1) Have you uploaded the picture to the site, if you haven't you need to also upload the picture?
2) Take a look at the source code, by right clicking the .html file, then opening it with notepad or wordpad, make sure that img code is correct. It should look something like this: <img src="picture.jpg"/> , where picture.jpg is substitued with the filename of the picture. Remember, the file name is case sensitive.