เขียนโปรแกรม php mysql ส่งค่าไม่ยอมลงฐานข้อมูลครับไม่รู้ติดไรไหม

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<?
//Function ติดต่อฐานข้อมูล 
require_once('../config/config.php');

$sql = "select * from chapter where Chapter_Id = '".$_GET["Chapter_Id"]."'"; //คำสั่ง SQL เพื่อการแสดงผล


$dbquery = mysql_query($sql);
$result = mysql_fetch_array($dbquery); 

if($_GET["Action"] == "Save")
{
	
	if(trim($_POST["txtquestion"]) == "")
	{
	echo"<script language='JavaScript'>";
		echo"alert('กรุณากรอกคำถาม');";
		echo"window.location='NewQuestion.php';";
		echo"</script>";	
		exit();	
	
	}	
		
	
	
	//*** Insert ChapterQuestion ***//
$sql = "INSERT INTO single_question_choice 
(Chapter_Id,Question_Details,Choice_1,Choice_2,Choice_3,Choice_4,Choice_5, Choice_6,Single_Choice_Correct) VALUES ('".$_GET["Chapter_Id"]."','".$_POST["txtquestion"]."','".$_POST["txtChice1"]."' ,'".$_POST["txtChice2"]."','".$_POST["txtChice3"]."','".$_POST["txtChice4"]."' ,'".$_POST["txtChice5"]."','".$_POST["txtChice6"]."','".$_POST["rdoCorrect"]."') ";
$dbquery = mysql_query($sql);	
									echo"<script language='JavaScript'>";
									echo"alert('บันทึกข้อมูลเสร็จเรียบร้อบ');";	
echo 
"window.location='ShowQuestion.php?Chapter_Id=$_GET[Chapter_Id]';";												
									echo"</script>";							
	}


?>



<title>..:: ระบบจัดการฐานข้อมูล ::</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<div align="center"><br>

  <table width="100%" border="0" align="center" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td align="center" background="./main_files/pyayam_top_02.jpg"><h1><img src="image/haeader 2.jpg" width="700" height="177" /></h1></td>
      </tr>
    </tbody>
  </table>
</div>
<div align="center">
  <table width="700" border="0">
      <tr>
        <td height="30" align="right" valign="middle" background="./image/10.jpg" bgcolor="#DDDDDD"><a href="main.php">หน้าแรก </a><a href="#"></a>|| <a href="logout.php">Logout</a></td>
      </tr>
    </table>
</div>
<form action="NewQuestion.php?Chapter_Id=<?=$result["Chapter_Id"];?>&Action=Save" method="post" name="frmMain" id="frmMain">
  <table cellspacing=0 cellpadding=0 width="68%" bgcolor=#CCCCCC border=0 align="center" height="10">
    <tbody>
      <tr bgcolor=#e5e5e5> 
        <td width="31" bgcolor="#FFFFFF"> 
          <div align="center">
            <table width="100%" border="0" cellspacing="2" cellpadding="2">
              <tr>
                <td colspan="3">บทที่
                <input name="txtChapterTitle" type="text" id="txtChapterTitle" value="<?=$result["Chapter_Title"];?>" /></td>
                <td width="8%">&nbsp;</td>
              </tr>
              <tr>
                <td colspan="3" rowspan="2">เพิ่มรูป
                  <label for="textfield">
                    <input type="file" name="file1" class="txtbox" />
                </label></td>
                <td>&nbsp;</td>
              </tr>
              <tr>
                <td>&nbsp;</td>
              </tr>
              <tr>
                <td colspan="3">คำถาม</td>
                <td>&nbsp;</td>
              </tr>
              <tr>
                <td width="8%" valign="top">&nbsp;</td>
                <td width="32" colspan="2"><textarea name="txtquestion" id="txtquestion" cols="80" rows="5"></textarea></td>
                <td>&nbsp;</td>
              </tr>
              <tr>
                <td colspan="4"><div align="center">ตัวเลือก1.
                  <input name="txtChice1" type="text" id="txtChice1" value="" size="80" />
                  
                  เฉลย
                  <input type="radio" name="rdoCorrect" id="rdoCorrect" value="radio" />
                  
                </div>
                <label for="radio"></label>                <label for="checkbox"></label></td>
              </tr>
              <tr>
                <td colspan="4"> <div align="center">ตัวเลือก2
                  <input name="txtChice2" type="text" id="txtChice2" value="" size="80" />
                  เฉลย
                  <input type="radio" name="rdoCorrect" id="rdoCorrect" value="radio" />
                </div></td>
              </tr>
              <tr>
                <td colspan="4"><div align="center">ตัวเลือก3.
                  <input name="txtChice3" type="text" id="txtChice3" value="" size="80" />
                  เฉลย
                  <input type="radio" name="radio" id="rdoCorrect" value="rdoCorrect" />              
                </div></td>
              </tr>
              <tr>
                <td colspan="4"><div align="center">ตัวเลือก4.
                  <input name="txtChice4" type="text" id="txtChice4" value="" size="80" />
                  เฉลย
                  <input type="radio" name="rdoCorrect" id="rdoCorrect" value="radio" />              
                </div></td>
              </tr>
              <tr>
                <td colspan="4"><div align="center">ตัวเลือก5.
                  <input name="txtChice5" type="text" id="txtChice5" value="" size="80" />
                  เฉลย
                  <input type="radio" name="rdoCorrect" id="rdoCorrect" value="radio" />              
                </div></td>
              </tr>
              <tr>
                <td colspan="4"><div align="center">ตัวเลือก6.
                  <input name="txtChice6" type="text" id="txtChice6" value="" size="80" />
                  เฉลย
                  <input type="radio" name="rdoCorrect" id="rdoCorrect" value="radio" />              
                </div></td>
              </tr>
              <tr> 
                <td>&nbsp;</td>
                <td colspan="2"><div align="center">
                  <input name="btnSave" type="submit" id="btnSave" value="บันทึก" />
                  <input type="reset" name="Reset" id="button" value="เขียนใหม่" />
                  <input name="Cancel" type="button" class="button" id="Cancel" value="ยกเลิก" onclick="window.location='ShowQuestion.php?Chapter_Id=<?=$result["Chapter_Id"];?>';" />
                </div></td>
                <td>&nbsp;</td>
              </tr>
            </table>
          </div></td>
      </tr>
  
    </tbody>
  </table>
</form>

<div align="center">
  <table width="700" border="0">
    <tr></tr>
    <tr>
      <td height="30" colspan="3" bgcolor="#DDDDDD" background="./image/10.jpg"></td>
    </tr>
  </table>
</div>