存图片到mysql提示出错

[winver1984]

错误提示：Warning: fread(): supplied argument is not a valid stream resource in D:\AppServ\www\eaglestar\admin\fckedit\index.php on line 115

<!-- 提交数据库 -->
<?
	if($_POST['FCKeditor1'] != ""){
		$conten = $_POST['FCKeditor1'];
		$prosel = $_POST['prosel'];
		$title = $_POST['title'];  
		
		
		$form_data = $_FILES['form_data']['tmp_name'];	 
		//echo $form_data."aaaa";
		$data = addslashes(fread(fopen($form_data, "r"), filesize($form_data)));		
		$product_desc_name = $_POST['product_desc_name'];
		$sql = "insert into  db_proconter(pro_title,pro_conect,pro_description,page_id,image,datatime) values('$title','$conten','$product_desc_name','$prosel','$data',now())";
		
		mysql_query("SET NAMES utf8");
		$rs = mysql_query($sql);
		if($rs){
			echo("<script type='text/javascript'> alert('操作成功！');location.href='index.php';</script>");
		}else{
			echo $sql;
		}
		//echo $conten;
	}
?>
<!-- 提交数据库 End -->

[hzcenter]

这个。。。fread读不到文件