My solution was to ping my server which has to have a static IPv6 address anyway. To do that I had to add an incoming filter rule that directed ICMP to my router. That works. My problem now is that I can't get the incoming filters for the server to work. The only way I found was a generic 'let it all in' rule - basically putting the server into a DMZ and I don't want to do that.
So I'm waiting for a response on their forums.