PayPal Button is disabled

I have a PayPal Button tested in sandbox environment and it worked. Now i am trying to get it working in the live environment. I know that in the simulator the PayPal-Live Env doesnt work, so i created an Ad-Hoc build and deployed it on the iPhone. But the button is always disabled.

I have already my Live APP-ID from PayPal.

var ppButton = Ti.Paypal.createPaypalButton({ width: 152, height: 33, top: 30, left:60, appId:"APP-XXX",
buttonStyle: Ti.Paypal.BUTTON_152x33, paypalEnvironment: Titanium.Paypal.PAYPAL_ENV_LIVE,

                    feePaidByReceiver: true,
                    transactionType: Titanium.Paypal.PAYMENT_TYPE_SERVICE,

                    enableShipping: false,
                    payment: {
                        amount: 1.99,
                        tax: 0.00,
                        shipping: 0.00,
                        currency: "EUR",
                        recipient: "pay_pal_live_account@mail.com",
                        itemDescription: "Order",
                        merchantName: "IphoneOrder"
                    }
                });

So what do i have to do in order get PayPal Live Environment working with Titanium MPL?

Any ideas?

Thanks!