I see you are a brand new here. You might want to read this post: Newbies can now pay a small fee to enable images

Bottom line is, you will need to be a Copper Member before posting an image as a Brand New/Newbie (FAQ: Everything you need to know about forum 'activity, account ranks and merit).

If you are looking for instruction then here you find it: https://bitcointalk.org/index.php?topic=573972.msg6257815#msg6257815

This site (https://imgur.com) works better for me when it comes to upload an image to use it in the forum.