Your html is wrong anyway as it possibly should be more like this.
<table border="0" cellpadding="0" cellspacing="0" align="center" width="960">
<td style="height: 210px; background-image: url('/templates/icy_phoenix/images/dark/sitelogo_small.png') no-repeat;">
You possibly need to spend some time learning more about html, css and the structure of the .tpl files - Because once one starts to modify themes - one is generally left to their own devices for obvious reasons
to complete what they are trying to do.