Hover text on image (how to?)

For uploading my images i've got a create photo content.
With this i've got an option for adding title, description and alt text.

Right now i've changed three title things:

1.
In my original page.tpl.php file was this:
<?php if ($title): print '<h2'. ($tabs ? ' class="with-tabs"' : '') .'>'. $title .'</h2>'; endif; ?>

I have changed it to this:
<h2 class="title"><?php if ($title == "") print $title ?></h2>

This was for preventing drupal to put a title above my contact form and slideshow.

2.
In my original node.tpl.php file was this:
<h2><a href="<?php print $node_url ?>" title="<?php print $title ?>"><?php print $title ?></a></h2>

I have changed this to:
if ($title): print '<h2'. ($tabs ? ' class="with-tabs"' : '') .'>'. $title .'</h2>'; endif;

This was for preventing drupal to put a title above the images on my front page (and the following pages).

3.
I have removed the titles from my views (side building, views).
This was for removing all the same titles from the galleries.

Step two was for removing the titles on top of images (on the frontpage and further). Right now i know that i want this titles above these images, so i think i can change it back
to the original code.

But, to come to the point. I am sure that before changing these things above there was no hover on top of the images.
I think mcfilms is right with this and that it has got something to do with my theme.
Sadly my knowledge is lacking to much for pinpointing the problem.

Thanks alot,
Edward

I think the images nodes already had a title.

The title for the images was not activated.

All i had to do was enabling custom title text in Title text settings.

Thanks.

Greetings,
Edward