simple replace the following coding :

<if condition="$maxposter[userid]"><div><phrase 1="member.php?$session[sessionurl]u=$maxposter[userid]" 2="$maxposter[username]" 3="$maxposter[total]">$vbphrase[most_active_user_in_forums]</phrase></div></if>

TO :

<div class="smallfont">
<if condition="$maxposter[userid]"><div><phrase 1="member.php?$session[sessionurl]u=$maxposter[userid]" 2="$maxposter[username]" 3="$maxposter[total]">$vbphrase[most_active_user_in_forums]</phrase></div></if>
</div>

dat will do da trick
enjoy

That worked, thankyou.

Simple & nice - installed ;)