question about simple taging

hi i wrote a code to add all of my posttitles to wp_stp_tags table.it worked all tags are ok but when i use <?php STP_Tagcloud(); ?> it doesn’t show the new ones.do you have any idea.here is the code that i used.

$query=mysql_query("select * from wp_posts where id>1200");

while($r=mysql_fetch_array($query)){

$baslik=$r['post_title'];
$aydi=$r['ID'];

mysql_query("insert into wp_stp_tags (post_id,tag_name) values('$aydi','$baslik')");
echo mysql_error()."<br>";}