Password from return url of recuring paypal payment is not matched with the one in the paypal confirmation page

i have integrated the recurring paypal payment method in mysite. In this method , i get the username and password from the return url. The username is same on both the return url and paypal confirmation page. But the password is different in both return url and paypal confirmation page. i need the same password in both confirmation page and return url. My code is . .

<form action="paypal.php" method="post">  
<!-- Identify your business so that you can collect the payments. -->  
 <input type="hidden" name="business" value="alice@mystore.com">  
 <!-- Specify a Subscribe button. -->  
 <input type="hidden" name="cmd" value="_xclick-subscriptions">  
 <!-- Identify the subscription. -->  
 <input type="hidden" name="item_name" value="Alice's Weekly Digest">  
 <input type="hidden" name="item_number" value="DIG Weekly">  
 <!-- Set the terms of the 1st trial period. -->  
 <input type="hidden" name="currency_code" value="USD">  
 <input type="hidden" name="a1" value="0">  
 <input type="hidden" name="p1" value="14">  
 <input type="hidden" name="t1" value="D">  
 <!-- Set the terms of the 2nd trial period. -->  
 <input type="hidden" name="a2" value="5.00">  
 <input type="hidden" name="p2" value="3">  
 <input type="hidden" name="t2" value="W">  
 <!-- Set the terms of the regular subscription. -->  
 <input type="hidden" name="a3" value="49.99">  
 <input type="hidden" name="p3" value="1">  
 <input type="hidden" name="t3" value="Y">  
 <input type="hidden" name="src" value="1">  
  <input type="hidden" name="usr_manage" value="1">  

  <input type="hidden" name="return" value="http://server/projects/ananth/subscribebutton/thanks.php">  

 <input type="image" name="submit" border="0"  
 src="https://www.paypal.com/en_US/i/btn/btn_subscribe_LG.gif"  
 alt="PayPal - The safer, easier way to pay online">  
 <img alt="" border="0" width="1" height="1"  

src="https://www.paypal.com/en_US/i/scr/pixel.gif" >  
<开发者_如何学C;/form> 

In this paypal confirmation page, the username and password are as follows

Password: deal2minor Username: pp-cheersidle

In this Return url page, the username and password are as follows

Password : ojjxcsIatFLp2 Username : pp-cheersidle

I need the same password in the confirmation page to get returned in the return url. So only i can store it in my database .

Please advise me. . . .