Using PHP to control FTP upload files The problem has been simplified into the simplest of the code why is there still an exception?

Using PHP to control the FTP upload file problem has been simplified to the simplest code why still have errors???
$file = ' aaa.txt ';//files under the root directory
$remote _file = ' aaa1.txt ';//remote file

$conn _id = Ftp_connect ($server);

$login _result = Ftp_login ($conn _id, $username, $password);

FTP_PASV ($conn _id, true);

if (Ftp_put ($conn _id, $remote _file, $file, ftp_binary,0)) {
echo "successfully uploaded $file \ n";
}
else {
echo "There is a problem while uploading $file \ n";
}

Ftp_close ($conn _id);

Error message: Warning:ftp_put () [Function.ftp-put]: Aaa.txt:Access is denied. In D:\Program files\appserv\www\wx\ftp.php on line 63
There is a problem while uploading aaa.txt

------Solution--------------------
Access is denied
Access is denied.

------Solution--------------------
Aaa.txt to change the permissions of this file. To make it readable, writable, ...
------Solution--------------------
Does the ftp_put have the same name overlay feature? The image does not have
------Solution--------------------
Warning:ftp_put () [Function.ftp-put]: Aaa.txt:Access is denied. Permissions issues
------Solution--------------------
It is clear that Wood has the right to take part in the speeches of NPC representatives

