What I do is have an account at Photobucket.com. I then upload from the computer to that site. After I have it uploaded to Photobucket, you will see some choices for the picture. I click on "direct link" and copy that to my clip board.

Then at the forum here, in the post, I click the image icon at the very end of the upper tray. It will then give you an address link. Click your cursor in there, and then paste the address of the picture from Photobucket into that link and enter it. The picture should then appear in the post.