I realize that you've already had a few people commenting trying to help out, but if I may offer some tips: if you go to our posting guidelines, you'll find you can copy and paste the HTML code for posting images (as well as the ever-important LJ-cut).
I suspect the problem here may lie in where your images are hosted. You can easily upload and have your images hosted on sites like tinypic and the like. After you upload an image there, it'll give you the HTML code or you can use the direct link and code it yourself.