Stored procedure is returning -1

Hello Trivedi,
        Thanks for the info. I have used the same method and I got the exact ID value. Thank you all.

Thanks,
Krishna Bharath

Hello Ravi,

        This is how i am writing the stored procedure.
        @UserId int,
        @IP nvarchar(20)
        The table tblData has the following columns
        ID int PrimaryKey Identity
        UserID int null
        Date datetime null
        IP nvarchar(20) null

        insert into tblData values(@UserID,GETDATE(),@IP)

        return scope_identity()

        My Asp.NET code is 

        DataEntites obj=new DataEntites();

        int a=obj.SPName(UserID,IP);

        In this way am passing the values to the database. 
        The a value is displaying as -1.
        But when am executing the stored procedure it is returning the appropriate value.
        I don't know what mistake I am doing.

can u please share me code.