[Plugin: WordPress SEO Yoast] Sitemap contains urls which are blocked by robots

hey. I saw a topic related to this issue, but its now closed without any solution if i m opening a new one.

I m facing this problem after submitting sitemap_index.xml to Google Webmaster Tools.

Issue:
Url blocked by robots.txt.

Description:
Sitemap contains urls which are blocked by robots.txt

Example:
Sitemap: asalounge.com/post-sitemap.xml
Value: http://asalounge.com/wp-includes/js/tinymce/plugins/wpeditimage/img/image.png

Using
*Wordpress SEO by Yoast.
*Default robots.txt of WP, which means there is no robots.txt on my root, it is generator automatically by WP

URLS.
http://asalounge.com/robots.txt
http://asalounge.com/sitemap_index.xml

Here are the images:
http://asalounge.com/xml-asalounge.jpg
http://asalounge.com/google-asalounge.jpg

waiting for a solution….