The amount is not displayed in paypal form


I am using the following paypal code but still the amount is not displayed in paypal form once the website redirect the page to paypal.

 `<form action="" method="post" target="_top">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="XXXX">
<input type="hidden" name="amount_1" value="200">
<input type="image" style="width: 70px !important; padding: 0px !important;"     src="" border="0" name="submit" alt="PayPal – The safer, easier way to pay online.">
<img alt="" border="0" src="" width="1" height="1">

Please let me know, why the amount is not displaying.

Thanks, Gladiator

Finally I found the answer, & maybe it is useful to others, whenever you create the paypal button make sure in step 2 "Save Button At PayPal" is not clicked & second once you create the button, remove code protection & then select the code & copy the paypal generated code.

It will solve the problem.