Well decided to bite the bullet and enable IPv6

Set the IPv6 information in on the LAN 1 IPv6 setup start address/end address plus dns server IPv6 addresses, moved to the WAN internet setup IPv6 changed that to PPP enabled rebboted router all seemed ok...

Well said seemed ok until I visited google.co.uk where it failed to load then realised this forums wouldn't load, gametracker and few other websites. Tried in chrome, firefox, opera and internet explorer all failed disabled the IPv6 and all worked again.

Any ideas where I went wrong a tracert to google did complete in IPv6 just page would not load, gave message to check internet connection cables etc etc and disable proxy etc firewall. I did disable firewall and virus checker but it still failed.

Any ideas please

Which router model? The IPv6 setup pages are different on 3900 compared to the 2860. Also the ISP and WAN type might influence the setup.

Its the vigor 2860N

there are some guides here if helps
https://www.draytek.com/index.php?option=com_k2&view=item&id=1809&Itemid=293&lang=en