How do i solve this?

try
            {
                cnn.Open();
                SqlCommand cmd=new SqlCommand();
                cmd.CommandType = CommandType.StoredProcedure;
                cmd = new SqlCommand("SubmitRecord", cnn);
                cmd.Parameters.AddWithValue("@name",txtname.Text);
                cmd.Parameters.AddWithValue("@about",txtabout.Text);
                cmd.Parameters.AddWithValue("@address", txtaddress.Text);
                cmd.Parameters.AddWithValue("@email",txtemail.Text);
                cmd.Parameters.AddWithValue("@mobile", txtcno.Text);
                cmd.Parameters.AddWithValue("@refname", txtrefname.Text);
                cmd.Parameters.AddWithValue("@areyou",DropDownList1.SelectedValue.ToString());
                cmd.Parameters.AddWithValue("@interest",interests);
                cmd.Parameters.AddWithValue("@anyother",txtanyother.Text);
                cmd.Parameters.AddWithValue("@quote",quote);
                cmd.Parameters.AddWithValue("@sharenews",sharenews);
                cmd.Parameters.AddWithValue("@remark", txtremark.Text);
                cmd.Parameters.AddWithValue("@pass",pass);
               
                cmd.Parameters.AddWithValue("@typeofsub", sub);
                
                
               
                cmd.ExecuteNonQuery();

stored procedure:

ALTER PROCEDURE [dbo].[SubmitRecord]
(
@name	varchar(50),	
@about	nvarchar(MAX),	
@address	varchar(200),	
@email	varchar(50)	,
@mobile varchar(20),
@refname	varchar(50),	
@areyou	varchar(50),	
@interest	varchar(MAX),	
@anyother	varchar(MAX),	
@quote	varchar(50),	
@sharenews	varchar(50),	
@remark	varchar(MAX),	
@pass	varchar(50),	
@typeofsub	varchar(50)
)	
AS
INSERT INTO [Businessnews].[dbo].[tbl_register]
           ([name]
           ,[about]
           ,[address]
           ,[email]
           ,[mobile]
           ,[refname]
           ,[areyou]
           ,[interest]
           ,[anyother]
           ,[quote]
           ,[sharenews]
           ,[remark]
           ,[pass]
           ,[regdate]
           ,[typeofsub])
     VALUES(@name,@about,@address,@email,@mobile,@refname,@areyou,@interest,@anyother,@quote,@sharenews,@remark,
@pass,
GETDATE(),		
@typeofsub
)