I'm from Bulgaria, so please excuse my english

I have 1 c class net and deside to use ipv6 from tunnelbroker. Everything is ok but the reverse dns doesnt work for me. I use my own name servers. They work fine :
(root@mail)-(07:29pm)-(03/01)-(3)
(~)> host -6 test6.web-bg.org
test6.web-bg.org has IPv6 address 2001:470:9009::1
(root@mail)-(07:29pm)-(03/01)-(3)
(~)> host -6 2001:470:9009::1
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.9.0.0.9.0.7.4.0.1.0.0.2.ip6.arpa domain name pointer test6.web-bg.org.
But other name servers doesnt find my reverse hosts. In my account I put my dns servers, and wait about 48 hours but nothing.. What is work?
Regards Nikolay