No ipv6 connectivity via pcl-bng03 ?

[#1]

Hi,
Not 100% sure about this, as I put a custom kernel on my OpenWRT PPPoE endpoint last week (but I'm pretty sure it was working, and have debugged it since too), but...
I'm not getting any IPv6 connectivity via pcl-bng03 at the moment.  
I've been allocated 2a02:16c8:8a13:5801::1/64 by the gateway (I've previously had a /56 assigned - I assume from another gateway).  Traffic is going out on the interface, but nothing's coming back...  I can ping the advertised default router:
# ping6 fe80::2a0:a506:7e:db4a%pppoe-wan2
PING fe80::2a0:a506:7e:db4a%pppoe-wan2 (fe80::2a0:a506:7e:db4a%pppoe-wan2): 56 data bytes
64 bytes from fe80::2a0:a506:7e:db4a: seq=0 ttl=65 time=9.626 ms
64 bytes from fe80::2a0:a506:7e:db4a: seq=1 ttl=65 time=9.098 ms
but nothing beyond.
Anyone else in the same boat?

[#2]

Reconnected again and got onto ptn-bng01 (Telehouse North), and all working again now.  I was incorrect about the /64 above, I had been assigned a /56.  My account is ipv6test5@plusdsl.net if staff want to do any digging on the previous BNG etc.
My previous non-working allocation was:
2a02:16c8:8a13:5800::/56 via fe80::2a0:a506:7e:db4a
Tim.