I made a link to a index.php page from a post but it doesn't seem to work. The "index.php" gets removed from the link and a page saying "That page can't be found." shows up instead. The page I'm linking to is in the right directory and the link is correct, but the page gets removed when the link is followed.
<a href="../cssexample/darkmetal/index.php" target="blank">
<img class="alignnone wp-image-63 size-medium"
src="http://www.mjkrusing.com/wp-content/uploads/2015/01/design1-260x300.png"
alt="CSS3 Page 1" width="260" height="300" /></a>
Why can't I link to the index.php? You can have a look at the page on http://www.mjkrusing.com/programming/css3-dark-metallic-theme/
The picture is the link
Edit: The link works fine in post preview, but the problem occurs when I publish the post.