Deleting files from server with php and flash

1

I have a made a text fiel in flash where i type in the path to a pic on the server which should be erased. then i crated a save button calling the above php script.
Both really simple. I have set the permissions for the folders on the server but it doesn erase the file.

Here is the flash:

erase.onRelease = function() {
_level1.loadVariables(“erase_files.php”, “POST”);};

Here is the php: <?php
@unlink($erase_image);
?>

The variable being passe dfrom flash is $erase_image.
Anyone know how to do this?