When i run error occurs

Question

i design the following application as follows;

Name                    txt_name

Employeeid           Textbox2

Dept                    checkboxlist1

                            checkboxlist2

Gender                 Radiobuttionlist1

                             Radiobuttionlist2

DOB                       dropdown

Mobileno                txt_mobile

email                     txt_emailid

Address                 txt_address

I have one insert button.

con = new SqlConnection("Server=(local);initial catalog=master;Trusted_Connection=True");

        con.Open();

        SqlCommand cmd = new SqlCommand("Reg", con);

        cmd.CommandType = CommandType.StoredProcedure;

        cmd.Parameters.Add(new SqlParameter("@Empid", TextBox2.Text));

        cmd.Parameters.Add(new SqlParameter("@Name", txt_name.Text));

        cmd.Parameters.Add(new SqlParameter("@Dept", CheckBoxList1.Text));

        cmd.Parameters.Add(new SqlParameter("@Gender", RadioButtonList1.Text));

        cmd.Parameters.Add(new SqlParameter("@DOB", Calendar1.TodaysDate));

        cmd.Parameters.Add(new SqlParameter("@Mobile", txt_mobile.Text));

        cmd.Parameters.Add(new SqlParameter("@Email", txt_emailid.Text));

        cmd.Parameters.Add(new SqlParameter("@Address", txt_address.Text));

        cmd.ExecuteNonQuery();

        con.Close();

Creating Store Procedure code as follows

CREATE Procedure Reg

@Name varchar(50),

@Empid varchar(50),

@Dept varchar(50),

@Gender  varchar(50),

@DOB varchar(50),

@Mobile  int,

@Email Varchar(50),

@Address Varchar(50)

AS  

BEGIN

INSERT INTO Registration VALUES(@Name,@Empid,@Dept,@Gender,@DOB,@Mobile,@Email,@Address)

END

GO

Database  table design as follows;

Name   varchar

        Empid        varchar

        Dept          varchar

        Gender      varchar

        DOB           varchar

        Mobile         int

        Email         varchar

        Address     varchar

WHEN I RUN FOLLOWING ERROR OCCURS AS FOLLOWS;

Error converting data type nvarchar to int.