I didnt got time to actually go through the QVW you sent me, but if i have to do this, I will do in below show way.
Create a QVD which will store the count of employees. Say I have 20 employee now in my employee table and my employeecount qvd will also have 20 as count. Now if a new employee is added into employee table, what i would do, I would write a login in QV script that if the count of employee from count of employeecount qvd is greater then send the mail and also update the employeecount qvd with new count, if that is not greater then do not do anything.
Now to send mail i will use the alert functionality of qlikview, which will send alert as a mail that a new employee is added.
I guess the logic is clear to you.