The reason why you cannot see the window of the BOSS POS even if you opened it's icon is because it is minimized.
You will notice that as you click the BOSS POS icon, a little line is displayed so...
First, determine the error message displayed on POS.
“Invalid username/password”
1. Ensure to use the correct login credentials.
2. Check if the Capslock and Numlock ...
On your web browser, go to your ninetails local.
Enter your username and password then click Login.
Select Item.
From the item list menu, search the item to ...