IPv6 nginx bind problem

[GuidoK]

Debian 7.4 64, Plesk 11.5.30 Update #40

I have changed the server certificate and installed several ones to dedicated ips. Now nginx won't start correctly so that websites are not shown:
2014/04/10 03:08:50 [emerg] 2990#0: bind() to [xxxx:xxx:xxx:xxxx::x]:80 failed (99: Cannot assign requested address)

I followed this KB article which works, but the problem persists after a reboot of the machine.
What can I do? Thank you in advance.

 

[IgorG]

I think that you need to check difference in network interfaces configuration before and after reboot. Maybe changes which you made are not permanent.

 

[GuidoK]

I did not change anything on the console, though. At the moment no certificate and no website is set to the IPv6 adress, but the log still comes up with the same problem after reboot.