Authorize.net

I'm using the Authorize.net module that's included in v1.4.
I'm getting the following error at checkout:

"Ship to First Name is required"

The Billing and Shipping address are the same and have first names.

Anyone know why I'd be getting this error?

Thanks

You probably have it set in your authorize.net account to require shipping address.
The module that comes with opencart doesn't actually pass in the shipping address.

You can disable those fields from being required in your authorize.net account