Store Procedure error as Procedure or function 'insertvalue' expects parameter '@ename', which was not supplied.

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SQL-Server

Hi frnds am inserting values in stored procedure but often am getting error as

Procedure or function 'insertvalue' expects parameter '@ename', which was not supplied.

My Table Fields are

eid	int	Unchecked  //Primary Key is Ser
ename	varchar(50)	Checked
gender	varchar(50)	Checked
dept	varchar(50)	Checked
adress	varchar(50)	Checked
age	varchar(50)	Checked
uname	varchar(50)	Unchecked
pswd	varchar(50)	Checked
cntctno	varchar(50)	Checked
		Unchecked

My stored Procedure Code

CREATE PROCEDURE dbo.insertvalue
@eid int output,
@ename varchar(50),
@gender varchar(50),
@dept varchar(50),
@adress  varchar(50),
@age  varchar(50),
@uname  varchar(50),
@pswd  varchar(50),
@cntctno  varchar(50),
@IdentitY int OUTPUT
AS
BEGIN
Insert sample (ename,gender,dept,adress,age,uname,pswd,cntctno)
Values
(@ename,@gender,@dept,@adress,@age,@uname,@pswd,@cntctno)
END
SELECT @eid  = @@IDENTITY;

My C# Code as

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["conect"].ConnectionString);

        con.Open();
        SqlCommand cmd = new SqlCommand("insertvalue", con);
        cmd.CommandType = CommandType.StoredProcedure;
        try
        {
            cmd.Parameters.Add("@empname", SqlDbType.VarChar).Value= objBELUserDetails.empname;
            cmd.Parameters.AddWithValue("@genderd", SqlDbType.VarChar).Value=objBELUserDetails.genderd;
            cmd.Parameters.AddWithValue("@deptmnt", SqlDbType.VarChar).Value = objBELUserDetails.deptmnt;
            cmd.Parameters.AddWithValue("@adressdetail", SqlDbType.VarChar).Value = objBELUserDetails.adressdetail;
            cmd.Parameters.AddWithValue("@ages", SqlDbType.VarChar).Value = objBELUserDetails.ages;
            cmd.Parameters.AddWithValue("@usrname", SqlDbType.VarChar).Value = objBELUserDetails.usrname;
            cmd.Parameters.AddWithValue("@paswd", SqlDbType.VarChar).Value = objBELUserDetails.paswd;
            cmd.Parameters.AddWithValue("@contctno", SqlDbType.VarChar).Value = objBELUserDetails.contctno;
            cmd.Parameters.Add("@ERROR", SqlDbType.Char, 500);
            cmd.ExecuteNonQuery();
            string strMessage = (string)cmd.Parameters["@ERROR"].Value;
            con.Close();
            return strMessage;
        }
        catch (Exception error)
        {
            throw error;
        }
        finally
        {
            cmd.Dispose();
            con.Close();
        }

pls Help me am newer to Store Procedure

Thank You..