we are not shipping to your region at this time

I am using the flat shipping module and when I test my cart using my home address, I receive Sorry, "we are not shipping to your region at this time."

I have read this thread.

http://www.zen-cart.com/forum/showthread.php?t=162486&highlight=Sorry%2C+region+time.&page=2

with the hope of figuring out the problem. No luck :(

THis is the error log.

[12-Aug-2011 09:14:13] PHP Warning: include_once(includes/modules/shipping/flat.php) [<a href='function.include-once'>function.include-once</a>]: failed to open stream: No such file or directory in ........../www/includes/classes/shipping.php on line 58
[12-Aug-2011 09:14:13] PHP Warning: include_once() [<a href='function.include'>function.include</a>]: Failed opening 'includes/modules/shipping/flat.php' for inclusion (include_path='.:/usr/local/php5/lib/php') in ........../www/includes/classes/shipping.php on line 58
[12-Aug-2011 09:14:13] PHP Fatal error: Class 'flat' not found in .........../includes/classes/shipping

THis is line 58 from /www/includes/classes/shipping.php

include_once(DIR_WS_MODULES . 'shipping/' . $include_modules[$i]['file']);

I am not sure how to progress from here.

TIA Tom

Check that the file:
/includes/modules/shipping/flat.php

is the code file ...

Check that the file:
/includes/languages/english/modules/shipping/flat.php

is the language file ...

Yes it is. I double checked it.

If you go to the Modules ... Shipping ... is everything displaying correctly and you see the right panel?

Yes, everything looks displayed properly in modules/shipping in the admin.

Try to do a REMOVE on the Flat Rate flat shipping module and then make sure the error goes away ...

Then, reload a clean copy for:
includes/modules/shipping/flat.php

Next, do the INSTALL and configure it ...

Does the error return?

Yes, the error returns.

Could you PM me the full error in the debug log from the /cache directory without anything cut out ...