To post images:
1. Save your screenshot in paint as JPG or something.
2. Upload it on a picture hosting site (e.g.
http://www.imageshack.us/)
3. Copy and paste the direct image link here and put the codes [*img] [/img] around the link (without the *).
OR : You can just click the clipart icon (little icon with a yellow background) and just copy and paste the direct image link there.
As for your problem, I'm not sure but someone else might know the solution.