To fix RSA not connecting to server (master computer) on office and warehouse computers (slave computers), do the following:
1. Go to store computer (master computer) and open RSA.
2. Right click on background where the 9 coloured boxes are.
3. Click "add firewall SQL exceptions".
4. Right click again on background and click "force database changes".
This will add an exception for all slave computers to access the master computer. If this doesn't fix the problem, call RSA: https://sites.google.com/a/beercartel.com.au/beer-cartel-brauhaus/store/rsa