WorldPay Callback page - 403 error

-- HikaShop version -- : 2.6.1
-- Joomla version -- : 3.4.8
-- PHP version -- : 5.5
-- Browser(s) name and version -- : Chrome 48

Hi there,

I can't get the World Pay plugin to confirm the payment back to HikaShop, and wonder if anyone can offer advice on how to fix this.

So far, I have the WorldPay (Test environment) settings as:

Payment response URL: <WPDISPLAY ITEM=MC_callback>
Payment Response enabled? YES
Enable the Shopper Response? YES

When I try a test transaction, on the WorldPay page, I get the following error:

"An available route for this purchase cannot be found. This may be caused by an error in the merchant configuration or by a remote systems failure."

So I started to look at the return URL, which I understand to be:

index.php?option=com_hikashop&ctrl=checkout&task=notify¬if_payment=bf_rbsbusinessgateway&tmpl=component&lang=en

When I try this in my browser, rather than getting a blank page which I understand would be normal, I get a 403 error. Having read another post about a similar problem, I edited bf_rbsbusinessgateway.php to change the 403 error that this might generate:

Line 250: JError::raiseError( 403, JText::_( 'Access Forbidden by BF' ));
return false;

BUT, this is not the error shown - it is the plain Joomla error stating simply "Access Forbidden".

So I'm stuck. Any advice?

Thanks in anticipation,

Jeremy.

SOLVED...

I removed the .htaccess file and it worked. I'll look at the reason in more detail!

Jeremy.