Judy,
If you go into your photobucket, you'll see where your pictures are. Underneath every picture, are about 3 little boxes with codes in them. They have things next to them like IMG Code, HTML Tag, and URL link. To post the picture on here, you need to click in the box that has IMG code. It should automatically copy it, so then you can past it in your post.
And from what you did above, it looks like you got the IMG part right. It needs to look like You need to have that slash before the IMG at the end.
Hope that makes sense!
Melissa