[Plugin: Simple Cart & Buy Now] Add to Cart takes user to their paypal account page

I’m assuming you have items in your shopping cart when you click on the paypal button? I’m not sure why it isn’t work — I would turn off Paypal encryption and look at form/submit link on the checkout page that goes to Paypal and see if it looks right. Maybe it is some strange character in the item(s) names that Paypal doesn’t like or SCABN isn’t escaping correctly.