Hvad er fejlen i denne replace

Her er koden:

<? session_start();
include("inc/tjek_login.php");

$result = mysql_query("SELECT * FROM cs_users WHERE(navn='$navn') ORDER BY id DESC") or die(mysql_error());
        $row = mysql_fetch_array($result) or die(mysql_error());

if (strlen(trim($answer)) < 1) {
    print "Du kan ikke poste tomme svar...";
} else {


$indlag = $row[indlag] + 1;

mysql_query("UPDATE cs_users set indlag = '$indlag' WHERE(navn='$navn')");

$dato = date("dmYHis");

$str = $answer;

$str = str_replace("&", "&amp;", $str);
    $str = str_replace("<", "&lt;", $str);
    $str = str_replace(">", "&gt;", $str);
    $str = str_replace("  ", "&nbsp; ", $str);
    $str = str_replace("\t", "&nbsp;&nbsp;&nbsp; ", $str);
    $str = str_replace("\r", "", $str);
    $str = str_replace("\n", "<br>", $str);
    $str = str_Replace(":)","<img src='smiley/icon_smile.gif'>",$str);
    $str = str_Replace(":D","<img src='smiley/icon_smile_big.gif'>",$str);
    $str = str_Replace("8D","<img src='smiley/icon_smile_cool.gif'>",$str);
    $str = str_Replace(":I","<img src='smiley/icon_smile_blush.gif'>",$str);
    $str = str_Replace(":P","<img src='smiley\icon_smile_tongue.gif'>",$str);
    $str = str_Replace("}:)","<img src='smiley/icon_smile_evil.gif'>",$str);
    $str = str_Replace(";)","<img src='smiley/icon_smile_wink.gif'>",$str);
    $str = str_Replace("B)","<img src='smiley/icon_smile_blackeye.gif'>",$str);
    $str = str_Replace(":o)","<img src='smiley/icon_smile_clown.gif'>",$str);
    $str = str_Replace("8","<img src='smiley/icon_smile_8ball.gif'>",$str);
    $str = str_Replace(":(","<img src='smiley/icon_smile_sad.gif'>",$str);
    $str = str_Replace("8)","<img src='smiley/icon_smile_shy.gif'>",$str);
    $str = str_Replace(":O","<img src='smiley/icon_smile_shock.gif'>",$str);
    $str = str_Replace(":(!","<img src='smiley/icon_smile_angry.gif'>",$str);
    $str = str_Replace("xx(","<img src='smiley/icon_smile_dead.gif'>",$str);
    $str = str_Replace("|)","<img src='smiley/icon_smile_sleepy.gif'>",$str);
    $str = str_Replace(":X","<img src='smiley/icon_smile_kisses.gif'>",$str);
    $str = str_Replace("^","<img src='smiley/icon_smile_approve.gif'>",$str);
    $str = str_Replace(":X","<img src='smiley/icon_smile_dissapprove.gif'>",$str);
    $str = str_Replace("?","<img src='smiley/icon_smile_question.gif'>",$str);
   
$pattern = '/(\[b\])((.|\n)*?)(\[\/b\])/';
    $pattern2 = '/(\[i\])((.|\n)*?)(\[\/i\])/';
    $replace = '<b>\\2</b>';
    $replace2 = '<i>\\2</i>';
    $str = preg_replace($pattern, $replace, $str);
    $str = preg_replace($pattern2, $replace2, $str);
    $str = str_replace("","",$str);
    $str = str_replace("","",$str);
    $str = str_replace("","",$str);
    $str = str_replace("","",$str);



mysql_query("INSERT INTO cs_forum_answer (answer,topic,dato,user) VALUES('$str','$id','$dato','$row[id]')") or die(mysql_error());


echo "$row[navn]";



echo "<p> $str";

} ?>


Her er fejlen:

You have an error in your SQL syntax near 'smiley/icon_smile.gif'>','3','15062003155110','1')' at line 1