Basically make sure the navbar template has the code
Code:
<if condition="$show['member']">
<td class="vbmenu_control"><a href="javascript:popUp('/forums/radio.blog/index.php','width=222,height=300,location=no,menubar=no,resizable=no,scrollbars= no,status=no')">Radio</a></td><else /></if>
not the other one as seen in my template install instructions, please show me your navbar ENTIRE code if this does not work, the next bit of code you showed me is useless, replace it with the one above as that one is not calling out javascript popup which sizes the window