The white parts look like they have been placed in an editor that doesn't know how to handle .png files.
That is not the original menu that came with the Crystal Blue Theme. Neither is the .css the original .css.
Your link here: h**p://alepczone.altervista.org/index.php indicates that you have successfully removed or caused not to work nearly every URL and Language VAR in the Dynamic Menu.
<a href="???????" (Nothing there) or languge here <a href="">???????</a>
<img src="./images/menu/application_view_tile.png" alt="" title="Main Links" style="vertical-align:middle;" /> <a href="javascript:void(0);" title="Main Links" style="vertical-align:top;"><b>Main Links</b></a>
</th>
</tr>
<tr>
<td class="row5">
<div id="menu_cat_1_1_h" style="display:'';position:relative;padding-top:0px;padding-bottom:0px;">
<table class="forumline-no2" width="100%" cellspacing="0" cellpadding="2" border="0">
<tr>
<td align="center" width="8"><img src="templates/vista_blue/images/crystal_blue/menu_sep.png" alt="" title="" style="vertical-align:middle;" /></td>
<td class="genmed" align="left"><a href=""></a></td>
</tr>
<tr>
<td align="center" width="8"><img src="templates/vista_blue/images/crystal_blue/menu_sep.png" alt="" title="" style="vertical-align:middle;" /></td>
<td class="genmed" align="left"><a href=""></a></td>
</tr>
<tr>
<td align="center" width="8"><img src="templates/vista_blue/images/crystal_blue/menu_sep.png" alt="" title="" style="vertical-align:middle;" /></td>
<td class="genmed" align="left"><a href=""></a></td>
I suggest that you install the theme as it comes, and then address your menu problem, or any other problems that you have created in your modifications of the templates or CMS.
We also don't support modifications that users make to the templates themselves. You break it - You fix it. ;)