I need a guidance or correction for my codings mobile express checkout payment in paypal using php?

The Following codings does not working for me.,The amount doesn't paid to relevant merchant id's i provided.,any mistakes are happen on my codings.,Is any body well known in this means i need help for this ASAP...

$nvpstr.="&METHOD=SetExpressCheckout
&RETURNURL=http://project.websolusionz.com/paypal/demo/thanks.php
&CANCELURL=http://project.websolusionz.com/paypal/demo/cart.php
&PAYMENTACTION=Sale
&PAYMENTREQUEST_0_CURRENCYCODE=USD
&PAYMENTREQUEST_0_AMT=0.1
&PAYMENTREQUEST_0_ITEMAMT=0.1
&PAYMENTREQUEST_0_DESC0=My Product (Product1)
&PAYMENTREQUEST_0_SELLERPAYPALACCOUNTID=merch1_1305546355_biz@gmail.com
&PAYMENTREQUEST_0_PAYMENTREQUESTID=CART26488-PAYMENT0
&L_PAYMENTREQUEST_0_NAME0=My Product (Product 1)
&L_PAYMENTREQUEST_0_QTY0=1
&L_PAYMENTREQUEST_0_AMT0=0.1

&PAYMENTREQUEST_1_CURRENCYCODE=USD
&PAYMENTREQUEST_1_AMT=0.1
&PAYMENTREQUEST_1_ITEMAMT=0.1
&PAYMENTREQUEST_1_DESC1=My Product (Product 5)
&PAYMENTREQUEST_1_SELLERPAYPALACCOUNTID=merch2_1305546449_biz@gmail.com
&PAYMENTREQUEST_1_PAYMENTREQUESTID=CART26488-PAYMENT1
&L_PAYMENTREQUEST_1_NAME1=My Product (Product 5)
&L_PAYMENTREQUEST_1_QTY1=1
&L_PAYMENTREQUEST开发者_高级运维_1_AMT1=0.1";

My PayPal URL And End Point :

$API_Endpoint = "https://api-3t.sandbox.paypal.com/nvp";

$PAYPAL_URL = "https://www.sandbox.paypal.com/webscr?cmd=_express-checkout-mobile&useraction=commit&token=";

Mobile View is not working correctly And one more thing i want to set up the 5% commission to the main dealer.,Is this possible in mobile express checkout...?

Thanks in advance....

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Change your endpoint to https://api-3t.sandbox.paypal.com/nvp and your redirect URL to https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&useraction=commit&token=XXXX - you're currently using Sandbox accounts (merch1_xxxxxxxxxxxx_biz@gmail.com) on the Live endpoint and redirecting to the Live URL.

You'll need to use the API credentials of your Sandbox seller account against the Sandbox NVP endpoint (shown above). The API call itself looks fine at first glance.