problem in insert data into database if there was Mobile number

HI

I have 2 table in database

1-Estate_free Table

2-Black_list Table

in Register.aspx users can insert their information and when click on insertButton it insert their data into Estate_free table

below is code

 protected void insertButton_Click1(object sender, ImageClickEventArgs e)
    {

        SqlCommand _cmd = new SqlCommand("InsertFreeState1", _cn);
        _cmd.CommandType = CommandType.StoredProcedure;
        _cn.Open();
        _cmd.Parameters.AddWithValue("@Transfer", ddlTran.SelectedItem.Text);
        _cmd.Parameters.AddWithValue("@Type", ddltype.SelectedItem.Text);
        _cmd.Parameters.AddWithValue("@Name", txtname.Text);
        _cmd.Parameters.AddWithValue("@Mobile", Txtmob.Text);
        _cmd.Parameters.AddWithValue("@Tell", Txttell.Text);
        _cmd.Parameters.AddWithValue("@id", Convert.ToInt32(ViewState["Id"]));
        _cmd.Parameters.Add("@Result", SqlDbType.NVarChar, 120);
        _cmd.Parameters["@Result"].Direction = ParameterDirection.Output;

        object o = _cmd.ExecuteScalar();
        int ID = (o != null && o != DBNull.Value) ? Convert.ToInt32(o) : 0;

        if (ID > 0)
        {
            ViewState["Id"] = ID.ToString();
        }
        int result = Convert.ToInt32(_cmd.ExecuteScalar());
        _cn.Close();
        string resultMessage = _cmd.Parameters["@Result"].Value.ToString();
        LBLERROR.Text = resultMessage;

    }

SP

create procedure [dbo].[InsertFreeState2]
@Name nvarchar(40)
,@mobile varchar(20)
,@Tell varchar(15)
,@Transfer nvarchar(20)
,@Type nvarchar(20)
,@id int =0
,@Result NVARCHAR(120) OUTPUT



AS BEGIN

IF ((NOT EXISTS(SELECT id FROM Estate_free WHERE (Mobil = @Mobile or Tell=@Tell))) AND  (NOT EXISTS(SELECT id FROM Black_List WHERE Mobile = @Mobile or Tell=@Tell)))
begin
		IF EXISTS(SELECT id FROM Estate_free WHERE id = @id AND @id > 0 )
            BEGIN
					UPDATE Estate_free
					SET
							Name=@Name
							,Mobil=@mobile
							,Tell=@Tell
							,Transfer=@Transfer
							,Type=@Type
							WHERE ID=@id
							SELECT @id
					SET @Result = 'you have been registered.' 
			END

		ELSE
				BEGIN
							INSERT INTO Estate_free(Name,Mobil,Tell,Transfer,Type)
							VALUES(@Name,@Mobile,@Tell,@Transfer,@Type)
							SET @Result = 'you have been registered.'  
					END
    
    

		END
 ELSE
			 begin
			 SET @Result = 'you can just register 1 Time '
			END
END

in above SP I define that if users tell or Mobile number was in Estate_free ro Black_list table it doesn't insert data into database and show 'You can just register 1 Time'

and if there wasn't their mobile or Tell in those table it insert their data into Estate_free table and show 'You have been registered'

problem is that when I enter data in database with new mobile number it didn't insert data in database and show 'you can just register 1 Time'

I mean it never insert data in database

what should i do?

Best Regards