Timeouts over new IPsec Tunnel

Hi, We currently have 3 branches connected over IPsec tunnels with two of our branches using FortiWifis (60D and 60E) and another one using a Sonicwall appliance. We are adding another tunnel to a company in Germany which is using a Fritz!Box 6490 Cable appliance. All branches have 100+ Mbps Internet connections and the IPsec tunnels between each of our existing locations are fast and have no issues.   I created an IPsec tunnel between the Fortigate in our main office and the Fritz!Box in Germany and the tunnel is shows as "up" and being successfully connected in both routers but when doing a ping scan of the main network using Advanced IP Scanner from Germany, the traffic logs in the Fortigate cloud first show timeouts, and then show that it was accepted, but nothing ever comes across. Any other types of transmissions over other protocols don't work as well.    I have access policies created to allow all between the tunnel (for now) and created a static route matching the other IP sec tunnels (modified for their subnet) and everything is really fast over SSL VPN connections, is there anything else I'm missing or something I should check in this instance?   Thanks!