duplicate title and description issue

[Autofresh.in]

If those two pages have the same title and description, simply change title description of sitemap.xml.

and the second URL is wrong.
it should be like
<!-- w --><a class="postlink" href="http://www.domainname.com/sitemap.xml">www.domainname.com/sitemap.xml</a><!-- w -->

While checking on google webmaster tool, I found the duplicate title and description issue in one of my web pages. The error sample show like this.

<!-- m --><a class="postlink" href="http://xyz.com/abc.php">http://xyz.com/abc.php</a><!-- m -->
<!-- m --><a class="postlink" href="http://xyz.com/abc.php/sitemap.xml">http://xyz.com/abc.php/sitemap.xml</a><!-- m -->

These 2 pages having same title and description. So it will show duplicate title and description issue in this. Anybody, please help how to fix this.