ใช้งาน PHPExcel แล้วมันค้างตอน Reader ครับไม่สามารถอ่านไฟล์ Excel ได้เลยเเต่มันยังเขียนได้อยู่

$fname = $_FILES['proctor']['name'];
			$taget = "files/".$_FILES['proctor']['name'];
			move_uploaded_file($_FILES['proctor']['tmp_name'],$taget);
			$strSQL = "INSERT INTO log_file (LogFile_FName,LogFile_Date,LogType_Id_FK) Values ('$fname','$curDateTime','f01')";
			$objQuery = mysql_query($strSQL);
			
			$inputFileName = $taget; 
			$inputFileType = PHPExcel_IOFactory::identify($inputFileName); 
			$objReader = PHPExcel_IOFactory::createReader($inputFileType); 
			$objReader->setReadDataOnly(true); 
			$objPHPExcel = $objReader->load($inputFileName); 
			$objWorksheet = $objPHPExcel->setActiveSheetIndex(0);
			$highestRow = $objWorksheet->getHighestRow();
			$highestColumn = 'D';
			 
			$headingsArray = $objWorksheet->rangeToArray('A1:'.'D1',null, true, true, true);
			$headingsArray = $headingsArray[1];
			 
			$r = -1;
			
			$namedDataArray = array();
			for ($row = 2; $row <= $highestRow; ++$row) {
				$dataRow = $objWorksheet->rangeToArray('A'.$row.':'.'D'.$row,null, true, true, true);
				if ((isset($dataRow[$row]['A'])) && ($dataRow[$row]['A'] > '')) {
					++$r;
					foreach($headingsArray as $columnKey => $columnHeading) {
						$namedDataArray[$r][$columnHeading] = $dataRow[$row][$columnKey];
					}

				}
			}
			$departmentID='';
			$departmentName='';
			$i = 0;
			
			foreach ($namedDataArray as $result) {
				if($departmentName != $result["Department"]){
					$departmentName=$result["Department"];
					$strSQL = "SELECT Depart_Id FROM 'department' WHERE Depart_Name = '$departmentName'";
					$objQuery = mysql_query($strSQL);
					$objResult = mysql_fetch_array($objQuery);
					$departmentID = $objResult["Depart_Id"];
				}
				$i++;
				$strSQL = "";
				$strSQL .= "INSERT INTO personal  ";
				$strSQL .= "(Person_Name,Person_Position, Personal_Num_of_Proctor, Depart_Id_FK) ";
				$strSQL .= "VALUES ";
				$strSQL .= "('".$result["Name"]."','".$result["Position"]."' ";
				$strSQL .= ",".$result["Number"].",'".$departmentID."')";
				mysql_query($strSQL) or die(mysql_error());
				echo "Row $i Inserted...<br>";
			}
			echo "file :  ".$_FILES['proctor']['name'].">>>>Upload Complete<br>";