If you get this error, do this:
1) click on the thread link that's provided
2) scroll to the image you want to repost
3) right-mouse click on it, and select "copy image address" to clipboard (or if you're using IE, select "properties, then select and copy the image URL)
4) go back to your post
5) Click on the <IMG SRC="http://www.nsxprime.com/forums/images/editor/insertimage.gif"> icon and PASTE the image address you just copied.
6) finish your message, and click "PREVIEW POST" just to make sure it's worked ok.
That's the shorthand description. Hope it helps.