Cannot Copy File Problem

[leomaster]

I have write the following code to upload file to server.
But i meet a problem where i unable to overwrite file
in server which state as user 1139. For file own by user 503 is ok.
What is user 1139?
Following is my upload code which i believe no prolem even not using FTP

$success= copy ("$txtImage","../upload/$txtImage_name") or die("Could not copy file");