Restore db from backup in SSMS - Amazon RDS MSSQL- Error 229

I have just signed up for Amazon Web Services for hosting my ASP.NET MVC 5 app. My app uses 3 databases, 1 from database first approach and 2 from code first approach. For that matter I have created databases from SSMS by connecting to the given server name for RDS and master UserName and Password. But Now I want to restore my database first database from my local machine. And when I tried to do so, the following error occured when I pressed add backup from device:

I have tried giving the EXECUTE permission in that database properties but of no use. How can I restore it?