Slave DNS server - invalid RPC call

I have two slave DNS servers set up per the tutorial on your site.

When I create a new virtual domain, the process fails when trying to add the new DNS records to the slave DNS servers. Error is something about - cannot login invalid RPC -

The slave domain was actually created, but the changes were not activated o the slave servers. I had to log into each and select "Apply Changes" in the DNS module to get the DNS resolution working.

The slave DNS servers are set to login with webmin username and password per the instructions in the tutorial. Make fast RCP calls is set to "no"

Status: 
Closed (fixed)