likemyapp ,in this application i am getting error

Question

this first error : when i am click the login and questions and register buttons at the time ,
this error gettingAn error occurred while executing the command definition. See the inner exception for details.

this is warning :Warning1Error 2103: The function import 'forumDBEntities.getLikes(In Edm.Int32(Nullable=True,DefaultValue=))' is not mapped to a store function. A function import needs to be mapped for successful execution.D:\w3schools\Likemyapp\Likemyapp\forumModel.edmx11Likemyapp

would you please help me sir, i am waiting for a ur reply