อัพรูป jpg ละเป็นสีดำอะงับ ช่วยที HELP MEeeeeeeeeeeeeeeee

<?
	$Act=$_GET['Act'];
	switch($Act){
		case 'Add'	:	 $CatName=$_POST['CatName'];
							$StockLimit=$_POST['StockLimit'];
							$Picture_Tmp=$_FILES['Picture']['tmp_name'];
							$Date=date('Y-m-d');
							$S=date("s");
							$Check=Select("ecom_category","WHERE CatName='".$CatName."'");
							$Num_Rows=Num_Rows($Check);
							if($Num_Rows == 0){
								$Insert=Insert("ecom_category","CatName,StockLimit,Date","'".$CatName."','".$StockLimit."','".$Date."'");
								if($Insert){
									$Select=Select("ecom_category","WHERE CatName='".$CatName."' AND StockLimit='".$StockLimit."'");
									$Cat=mysql_fetch_array($Select);
									if($Cat){
										$Rename=$Cat['CatId']."-".$S.".jpg";
										$ResizePicture=ResizePicture($Picture_Tmp,$Rename,180,"picture/category/");
										if($ResizePicture != ""){
											$Update=Update("ecom_category","Picture='".$Rename."' WHERE CatId='".$Cat['CatId']."'");
											if($Update){
												echo "<script language=\"javascript\">";
												echo "alert('ระบบทำการเพิ่มหมวดสินค้า ".$CatName." เรียบร้อย');";
												echo "window.location='ecom_category.php';";
												echo "</script>";	
											}	
										}
									}
								}
							}else{
								echo "<script language=\"javascript\">";
								echo "alert('หมวดสินค้า ".$CatName." มีอยู่ในระบบแล้ว');";
								echo "window.location='ecom_add_category.php';";
								echo "</script>";
							}
							
							

		}



?>