CentOS 5 :: 'AT' Command Fails To Rm From PHP

I have tried every variation I can think of to get an 'at' to rm a file after a certain amount of time.

echo 'rm -f /var/www/media/images/tempProducts/XYZ.png' | at now + 2 minutes

In php:

$apCommand = "echo 'rm -f " . $sTempName . "' | at now + 2 minutes";
exec ($apCommand);

I have:

- pasted the command into the command line as root and it works fine so it seems to be rights related -- rm gets scheduled and the file gets deleted after 2 minutes

- tried every variation of sudo within the statement including making sure that apache is listed in sudoers

- chmod to 777

- chown to apache

The rm command does get scheduled into the 'at' queue but the rm never removes the file.

at -c (without adding sudo to the 'at' statement)
#!/bin/sh
# atrun uid=48 gid=48
# mail apache 0
umask 22

[Code]....