NSupdate add delegation of zone NS ..

... Haveing a little wierd problem of my own, need some input (maybee i just
need some sleep.. dunno)..

I have a domain called "test2.inv" ... I what to delegate "test.test2.inv"
to nameserver "testaway.inv" ..

my ns update file:
- - -
server mytestserver.inv
zone test2.inv
update add test.test2.inv. 43200 IN NS testaway.inv.
- - -

The update command's debug output..


Reply from update query:
;; ->>HEADER<<- opcode: UPDATE, status: NOERROR, id:  28363
;; flags: qr ra ; ZONE: 0, PREREQ: 0, UPDATE: 0, ADDITIONAL: 0


but.. the zone is not updated..

if i change it to:
- - -
server mytestserver.inv
zone test2.inv
update add test2.inv. 43200 IN NS testaway.inv.
- - -

it's updated ... (but this is not what I want..)

What did I miss ?

Regards, Peter Larsen