I added an Application in Google Play Market. After that i added two products and publish them. After that i purchased some products with my test account. But 2 Days later when i tried to purchase a product. Google play server not gives me any Error and also not shows Purchase window.
As I was created test account which you used to purchase the product. After several purchases the Google play blocks that account for some time for purchases. I faced that problem already, and I did R&D on that. Finaly we implemented a solution i.e create another test account and do purchase using it, as old account get blocked for purchase . After some days you can try with previous account, then it will work fine.