To echo others, if you want the least troublesome setup, get 4sight. It provides for far more than simply accessing your home from outside and you will rapidly come to appreciate the benefits.
If you insist on using a vpn, the only port forwarding required is to allow for the remote connection over the WAN to the VPN router - sounds like you haven't done this. Assuming it is OpenVPN, that's TCP 443 and UDP 1194. Then, assuming you can connect into your home network (ignoring the usual ISP IP hurdles) you need to make sure that the IP your router allocates VPN clients is a routable subnet on your network otherwise you will not be able to reach the director. Without knowing more about your setup, those would be the most likely causes preventing it from working.