Brisey, there is something the server does not like in your post. I found at one stage if you take the full stop out of the word in bold, it would fail. sun.map but it seems OK today. I reported it, so it might have been fixed.
I think the problem is that it thinks you have included a URL in your post and it has tried to look it up and can't find it so you get the error.
Very frustrating.