ถามเรื่องระบบเสิร์ชข้อมูล php ใน joomla ค่ะ พอกดเสิร์ชแล้ว มันเด้งกลับไปที่หน้า index ค่ะ T T

<div>
<form name="frmSearch" method="get" action="index.php?option=com_content&view=article&id=105">
        <table  width="650">
            <tr>
                <th width="650">
                    <?php if (!empty($_GET["training_place"])): ?>
                        <input type="hidden" name="training_place" value="<?php echo $_GET["training_place"]; ?>"/>
                    <?php endif; ?>
                       
                    <?php
                        $objConnect = mysql_connect("mydb-pj.sit.kmutt.ac.th", "51270369csc499","NV3j0YnC") or die("Error Connect to Database");
                        $objDB = mysql_select_db("51270369csc499db");
						/*$strSQL = " SELECT student.*,training_place.* FROM training_place LEFT JOIN student ON training_place.pno = student.pno WHERE 1 ";*/
                        $strSQL = " SELECT * FROM training_place  WHERE 1 ";
                        $dropDownList = mysql_query($strSQL) or die("Error Query [" . $strSQL . "]");
                        echo "<select name=\"training_place\">
";
                        echo "<option value=\"\"></option>
";
                        while ($listItem = mysql_fetch_array($dropDownList)) {
                            if (!empty($_GET["training_place"]) && $_GET["training_place"] == $listItem['training_place']) {
                                echo "<option value=\"{$listItem['training_place']}\" selected=\"selected\">{$listItem['training_place']}</option>
";
                            } else {
                                echo "<option value=\"{$listItem['training_place']}\">{$listItem['training_place']}</option>
";
                            }
                        }
                        echo "</select>";
                    ?>
                        <input class="loginButton"  type="submit" value="Search" ></th>
                </tr>
                </table>
       				 </form>
                     
                     <?php
					  $objDB = mysql_select_db("51270369csc499db");
					  $strSQL = " SELECT student.*,training_place.* FROM training_place LEFT JOIN student ON training_place.pno = student.pno WHERE 1 ";
					  if (!empty($_GET["training_place"]) && $_GET["training_place"] != "") {
                            $strSQL .= " AND  training_place = '" . $_GET["training_place"] . "' ";
                            $objQuery = mysql_query($strSQL) or die("Error Query [" . $strSQL . "]");
                        }
					 
					 ?>
                        <table width="650" class="gridtable" >
                            <tr>
                                <th width="91"> <div align="center">Std_id</div></th>
                                <th width="98"> <div align="center">NAME </div></th>
                            </tr>
        				<?php
                        $i = 1;
                        if (!empty($objQuery)) {
                            while ($objResult = mysql_fetch_array($objQuery)) {
        				?>
                                <tr>
                                    <td><?php echo $objResult["ID"]; ?></td>
                                    <td><?php echo $objResult["NAME"]; ?></td>
                                </tr>
       						 <?php
                            }
                        }
        				?>
                    </table>

                </div>