nsupdate behavior

[Ted Wood]

I'm having trouble with dynamic updates.  My master zone is being updated
from the dhcp server and all seems to be well.  However, when I try to add
an entry with nsupdate, it never happens.  On the primary master I run:
#nsupdate
> update add kbase.twu.edu. 86400 A 168.55.93.135
> send
>

I have tried this with the trailing dot and without but to no avail.  This
is BIND 9.2.0rc1 running on Redhat 7.1.  Any help would be much appreciated.
Ted Wood