OutSystems Mobile 10 - 405 - HTTP verb used to access this page is not allowed.

I have redirected my request to Payment System , but after processing on payment system, its redirect post to my web application page but its always give me error "

405 - HTTP verb used to access this page is not allowed.

The page you are looking for cannot be displayed because an invalid method (HTTP verb) was used to attempt access.

"

I have also added the url of that payment gate way in my rest api and added Logging Level: to "Full"  from service studio, Kindly any one can tell me what is the issue

Little bit more investigation, payment url posting the form but when its come to my web screen, its give error post method not allowed, Please let me know how to allow post method in web screen.

Payment Method is only allow to post  a form to another domain.... Payment Method post the form and outsystem mobile web screen page not allowed to received post method, Kindly let me know how to allow post method on web screen or alter native solution