inserting dropdownlist item into sqlserver

Hi,
I have populated values from a table to dropdownlist.
now i want to insert selected dropdown list item in to sql server database. i have written code for this, but everytime the first item in dropdown list is inserting eventhough i select to other.
could any body let me now solution for this problem.
thanks in advance.

this is my command object:
myCmd = new SqlCommand("INSERT INTO EmpInfo ( EmpID, EmpName, Location, Department) VALUES ( @empid, @empname, @location, @department)",connection);

myCmd.Parameters.Add("@department", SqlDbType.VarChar).Value = drpdnlDept.SelectedItem.Text;