Your logo image is called in skin1/head.tpl where it says this...
Code:
<td class="HeadLogo"><a href="{$current_location}/"><img src="{$ImagesDir}/xlogo.gif" width="244" height="67" alt="" /></a></td>
{$current_location} ="wherever your x-cart installation is on your web server" (i.e.
www.mydomain.com/)
{$ImagesDir}= skin1/images (i.e
www.mydomain.com/skin1/images)
Make sure "xlogo.gif" is the same as your image. Either change the xlogo.gif to your image name in head.tpl, or your image name to xlogo.gif and make sure it is in the correct directory and has the correct filename extension.
You can check the location by right clicking on the "blank box with a red square" and choosing "View image". The location will be displayed in the browser url address bar. Make sure it matches exactly what is in head.tpl.