perdona me equivoque, lo soluciones asi: en footer.php puse:
Cita: <div id="footer">
<div class="botones-footer">
<a style="width:45px; height:45px;float:left;position:relative;left:120p x;top:20px;" class="fcbuton1" href="http://www.facebook.com/BauliaWeb" target="_blank"></a>
y en css
Cita: #footer .botones-footer a.fcbuton1 {float:left;position:relative;left:120px;top:20px; background: url(../images/facebook-black.png);}
#footer .botones-footer a.fcbuton1:hover { background: url(../images/facebook2.png);}