My Custom Payment Plugin is not listed when user wants to checkout

Hi

I have developed a custom payment plugin, and installed it and could configure it. I also enabled it in "Payment Methods" page of admin area, but it is not listed as a payment method for user to pay in checkout step.

https://drive.google.com/file/d/0B_5f5htULwLdbFlreko1SFl6YTg/view?usp=sharing

And here is the checkout page:

https://drive.google.com/file/d/0B_5f5htULwLdaEltX3NCeC15WXc/view?usp=sharing

There will be something wrong in the code.

I saw the logs and cant find anything. I tried to implement all methods regarding the payment and after that I uploaded the plugi again. But there were some logs before updating plugins as below :

A public action method 'null' was not found on controller 'Nop.Admin.Controllers.PaymentController'.  

Does it help ?