i have a problem with my upload

[simon2x1]

i have an upload page called upload.php and a display upload called display.php while i make use of my wamp server on my localhost and i access upload.php to upload an image the image go to a folder called picture and the image in this folder will display if i access the display.php page. now i have a webhost, in my file manager i have uploaded the two pages and i create the folder picture, if i visit my URL and i upload an image, the image will not go to the picture folder and also will not display in the display.php, want should i do, i my met to replace the file manager directory (/public_html/bypass_file/picture) with these (./picture) and also(<img src='public_htm l/bypass_file/picture/$present'/>) with(<img src='picture/$present'/>) or want should i do.

 
<?php
 upload.php
 
 
 if (isset($_POST['submit'])) {
 $filename = $_FILES['userfile']['name'];
 $tmpname  = $_FILES['userfile']['tmp_name'];
 $filesize = $_FILES['userfile']['size'];
 $filetype = $_FILES['userfile']['type'];
 
 $filename = $_FILES['userfile']['name'];
 $result = @copy($_FILES['userfile']['tmp_name'], "./picture/$filename");
 
 $fp      = @fopen($tmpname, 'r');
 $content = @fread($fp, filesize($tmpname));
 $content = addslashes($content);
 @fclose($fp);
 
 if(!get_magic_quotes_gpc())
    {
  $filename = @addslashes($filename);
            }
 mysql_query("INSERT INTO pixel (picname) VALUES('$filename')") or die(mysql_error());
 
 }else{
<form method="post" action="upload.php" enctype="multipart/form-data">
<input type="hidden" name="MAX_FILE_SIZE" value="2000000">
 <input type="file" name="userfile" />
 <input type="submit" name="submit" value="Submit" />
</form> 
}
?>  
 
 
<?php
 
 display.php 
 
 $sql = "SELECT * FROM pixel";
 $result1 = @mysql_query ($sql) or die('query error');
 $count = 0;
 while ($line = @mysql_fetch_array($result1, MYSQL_ASSOC)){
 $present = $line[picname];
 
 echo "<img src='picture/$present' width='65' height='65'/>";
 $count++;
?>