Mike,
Start writing, then go to "Preview"... Look below the message window for "+ Attachments and other options". Clicking that shows options which include "Attach:" Click on "Choose File" there, find and select your pic, and click "Upload". Noting the limit of 10 per post and each must be less than 1MB in size. The name of the picture(s) should now appear under the word "Attach:"
The trick here is that "Preview" will not show your attachment(s), you just have to believe they are there. It won't actually appear until you click "Post".
Give it a try!
Jimmy J