Then go to your Robokassa Merchant Account and create new shop. You need to specify Shop identifier, Password #1 and Password #2. Remember this parameters. They will be needed when setting up the plugin.
Also you need to specify callback URLs:
Result URL: http://your-domain.com/robokassa/result
Success URL: http://your-domain.com/robokassa/success Fail URL: http://your-domain.com/robokassa/fail
Method of sending data to Result Url: GET or POST. POST is recommended.
Your Robokassa Merchant Account is configured.
Now go to plugin settings page and specify these parameters:
* Shop Identifier
* Password #1
* Password #2
If you want to test your billing without really charging money you can use "Test mode" option.