The last week I upgrade my ISPConfig to the last version. I have: DNS1 (Master) DNS2 (Slave) WEB1 (Slave) POP1 (Slave) GIC1 (Slave) When I upgrade the ISPConfig I upgrade DNS1, and later the Slaves..... i don't read the thread http://www.howtoforge.com/forums/showthread.php?t=40038 the correct order is fisrt the Slaves and later the Master.... but I upgrade fisrt Master and later Slaves and the replication don't work..... Is there any procedure to solve this problem ?????? thanks