Please keep in mind that I am absolute Shopping Cart Creator novice.
Thanks very much

error
Bad username and/or password for API Access.
<?xml version="1.0" encoding="UTF-8"?><checkout-shopping-cart xmlns="http://checkout.google.com/schema/2"><shopping-cart><items><item><item-name>Item 1: Crown PSA2</item-name><item-description>Crown PSA2 stereo power amp.</item-description><quantity>1</quantity><unit-price currency="GBP">350.00</unit-price><tax-table-selector>None</tax-table-selector></item></items></shopping-cart><checkout-flow-support><merchant-checkout-flow-support><edit-cart-url>http://www.absolutesoundandlighting.co.uk/cart.php</edit-cart-url><shipping-methods><flat-rate-shipping name="Standard shipping charge applies"><price currency="GBP">7.50</price></flat-rate-shipping><flat-rate-shipping name="Ex-stock collection from store"><price currency="GBP">2.00</price></flat-rate-shipping></shipping-methods><tax-tables><default-tax-table><tax-rules><default-tax-rule><rate>0</rate><tax-area><world-area/></tax-area></default-tax-rule></tax-rules></default-tax-table><alternate-tax-tables><alternate-tax-table standalone="true" name="shipping"><alternate-tax-rules><alternate-tax-rule><rate>0</rate><tax-area><world-area/></tax-area></alternate-tax-rule></alternate-tax-rules></alternate-tax-table></alternate-tax-tables></tax-tables></merchant-checkout-flow-support></checkout-flow-support></checkout-shopping-cart>