i fixed my problem, with below simple steps,<br><br>i mirrored  the comment.tpl.php, and renamed to comment-case.tpl.php,<br><br>in that i did the changes as per my requirement, <br><br>its reached my requirement ,<br><br>
Thanks<br><br><div class="gmail_quote">On Fri, Jan 13, 2012 at 9:42 PM, Ms. Nancy Wichmann <span dir="ltr">&lt;<a href="mailto:nan_wich@bellsouth.net">nan_wich@bellsouth.net</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div><div style="font-size:12pt;font-family:arial,helvetica,sans-serif"><div><span>Check your theme settings (individually and the &quot;global&quot;). Most have a check box for showing user pictures in posts and comments.<br>
</span></div><div class="im"><div> </div><div><font color="#ff007f" face="bookman old style, new york, times, serif" size="4"><i><b>Nancy</b></i></font></div> <div><font face="arial, helvetica, sans-serif">Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.</font></div>
</div><div><br><blockquote style="border-left:2px solid rgb(16,16,255);margin-left:5px;margin-top:5px;padding-left:5px">  <div style="font-family:arial,helvetica,sans-serif;font-size:12pt"> <div style="font-family:times new roman,new york,times,serif;font-size:12pt">
 <div dir="ltr"> <font face="Arial"> <hr size="1">  <b><span style="font-weight:bold">From:</span></b> bharani
 kumar</font><br>
</div><br><div class="im"><div>how to display avatar image left side of the comment box. as well how to display the avatar image left side of the comment detail.<br> </div></div></div> </div> </blockquote></div>   </div>
</div><br>--<br>
[ Drupal support list | <a href="http://lists.drupal.org/" target="_blank">http://lists.drupal.org/</a> ]<br></blockquote></div><br><br clear="all"><br>-- <br>Regards<br>B.S.Bharanikumar<br><a href="http://php-mysql-jquery.blogspot.com/">http://php-mysql-jquery.blogspot.com/</a><br>