fix : The requested Payment Method is not available. -- 2

this error is due to the payment method not available for customer...may be old customer have selected some other payment method last time and it has been saved to their profile That's why new payment method is not available for old customer The requested Payment Method is not available. Trace: #0 /html/app/code/core/Mage/Payment/Model/[login to view URL](82): Mage::throwException('The requested P...') #1 /html/app/code/community/Sub1/Nps/controllers/[login to view URL](106): Mage_Payment_Model_Info->getMethodInstance() #2 html/app/code/core/Mage/Core/Controller/Varien/[login to view URL](418): Sub1_Nps_RedirectController->redirectAction() #3 html/app/code/core/Mage/Core/Controller/Varien/Router/[login to view URL](254): Mage_Core_Controller_Varien_Action->dispatch('redirect') #4 html/app/code/core/Mage/Core/Controller/Varien/[login to view URL](172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http)) #5 html/app/code/core/Mage/Core/Model/[login to view URL](365): Mage_Core_Controller_Varien_Front->dispatch() #6 html/app/[login to view URL](684): Mage_Core_Model_App->run(Array) #7html/[login to view URL](83): Mage::run('', 'store') #8 {main}