Foreign key Conflict in db

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C#

ASP.NET

C#4.0

I have following line of code want to submit value in the db but when I click On button but I get a following error.I have Made two tables in those tables EmpId Set to Primary Key And Id in other table set primary key and both are related by FK relationship.Where is problem where should I make changes.
Thanks & Regards.

The INSERT statement conflicted with the FOREIGN KEY constraint "FK_CheckInCheckOut_Employee". The conflict occurred in database "EmployeeRecord", table "dbo.Employee", column 'empId'.
The statement has been terminated.

 protected void imgbtnUpadteDB(object sender, ImageClickEventArgs e)
        {
            DBClassesDataContext db = new DBClassesDataContext();
            CheckInCheckOut chk = new CheckInCheckOut();
            Employee em = new Employee();
            chk.checkTime = System.DateTime.Now;
            if (chk.checkTime != null)
            {
                chk.checkTime = DateTime.Now;
            }
            else
            {
                chk.checkoutTime = DateTime.Now;
            }
            
            empId = 1;
          
            em.name = txtCheckIn.Text;
            db.CheckInCheckOuts.InsertOnSubmit(chk);
            db.Employees.InsertOnSubmit(em);
            db.SubmitChanges();
            Response.Redirect("Default.aspx");
}