I was trying to install ACX VeRsIoN: 12.81-0 (2325) on RHEL box (2.6.32-642.11.1.el6.x86_64) but after installation it was going to version 1912 then i try to upgrade and it was failed . Every time we install we have reboot the server for fresh installation . why we reboot the server for ACX installation?