samba - Dec 2012 - Ubuntu 12.04 / off HowTo / tsig verify failure

I've found here exact the same problem, I have got: 

https://groups.google.com/forum/#!msg/linux.samba/QM5jwvVnAPQ/jzQkuAF664oJ

 

but for some reason i can't post there.

 

i did everything according to the official howto - until to the dynamic dns
update test:

 

"/usr/local/samba/sbin/samba_dnsupdate --verbose --all-names"

 

I get:

tsig error with server: tsig verify failure

failed ns update: 2

failed update of 21 entries

 

has anybody a solution for this?

 

Thanks very much in advance,

Markus