incrediBILL - 3:35 pm on Jul 3, 2009 (gmt 0)

Customers don't like to be told what to do.

You don't tell customers to use Paypal, your site needs to drive the process, the process can be seamlessly integrated into your site.

Alternatively, disconnect authorize.net and just store the orders now so you can manually process them later.

Here's a list on PayPal's site supposedly indicating which carts are integrated using their Website Payments Pro, perhaps yours is on the list!
https://cms.paypal.com/us/cgi-bin/?cmd=_render-content&content_ID=developer/solutions_carts_wp_pro

[edited by: incrediBILL at 3:37 pm (utc) on July 3, 2009]