Thanks for remind to look in log.
The bind was already installed and using the port.

For others:
do command
Code: 
sudo lsof -i :53
if u see that "named" is running it means that bind is installed and you either must remove it or use it. I removed it, and released 40mb of ram.
Mutikasa Reviewed by Mutikasa on . dns status: SERVFAIL I'm trying to setup dns server on debian 6 with nsd3 utility. I just copied configuration files from old server and changed IP. then i do "dig" command and this is what I get: ; <<>> DiG 9.7.3 <<>> @localhost www.domain.net ; (2 servers found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 45308 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 Rating: 5