Re-naming Admin creates php errors

[teragram]

I have twice created a new installation of Zen Cart 1.3.8a on GoDaddy linux hosting. This installation has the latest patches applied. Re-naming the admin folder has caused the following php errors when logging in to the admin control panel.

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by...
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent...
Warning: Cannot modify header information - headers already sent by (output started at...

AND restoring the original un-changed configure.php file and renaming the folder back to "admin" triggers the errors also.

I have set the read/write status on the configure.php to 444.

I used the directions for re-naming the admin folder found at the following url:
https://www.zen-cart.com/tutorials/index.php?article=33

What have I missed?

Thank you,
Teragram