Zone transfers fro secondary

[Sherona Hoosen]

Hi
I am running bind8.2.3 on solaris 8

We set up a zone "asti.ac.za" as a secondary with the primary at ucthpx.uct.ac.za

I am however unable to get updates.

When I reload the DNS Iget the following errors
Nov 19 08:17:56 caesar named-xfer[1575]: [ID 364950 daemon.info] connect(137.158.128.1) for zone asti.ac.za failed: Connection timed out

Also the file that gets downloaded is a 0 byte file like 
-rw-r--r--   1 root     other          0 Nov 19 08:14 asti.ac.za.tqa4ed

The entries in named.conf is as follows

#===========Asti.ac.za =======

zone "asti.ac.za" {
        type master;
        file "asti/asti.ac.za";
        check-names fail;
        allow-update { none; };
        allow-transfer { 146.141.15.210; 146.141.15.222; 137.158.128.4; 137.158.128.11; 137.158
.128.1; };
        allow-query { any; };
};

Any idea as to waht could be causing the problem.

Things are fine at uct as other zones are able to update

Thanks
Cheers
sherona