using form post method in php

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PHP

Hi,

I am trying to pass array using form post method.

submit.php :

<form method="post"  action="makepub.php"> 
....  Loop
....   
echo '<table><tbody><tr><td align="center">';
echo '<input type="checkbox" name="file_list[]" value="'.$pr.'">' ;
echo '</td></tr></tbody></table><table><tbody><tr /></tbody></table>';	
....
....  Loop end
?>

makepub.php :

if (isset($_POST['submit1'])) { 
	$file_list = $_POST["file_list"];
	$how_many = count($file_list); 
echo 'Total No of Public files chosen : '.$how_many.'<br><br>'; 
if ($how_many>0) { 
	echo 'You changed following files to public : <br>'; 
		} 
for ($i=0; $i<$how_many; $i++) { 
	echo  ($i+1) . '- ' . $file_list[$i] . '<br>'; 
	//  Some code here
} 
	echo "<br><br>"; 
}
</br></br></br></br></br></br>

Ok these two files works perfectly on my localhost with XAMPP.
php version 5.3

but on my server array is not getting passed.
I checked by replacing the array with single variable. Even so nothing is passed to file makepub.php

Is there anything i am missing with post here ???
Any suggestion is appreciated.

Thanks.