You need to give us a bit more than that, if you need help. Computer? Operating system/version? Disk space, RAM, etc.? What have you already tried, to diagnose/fix the problem?
pc windows 7 750gb disk space 8gb ram
i have tried updating it using adobe application manager a few times but it seems to fail
the message send to me is the server may be offline, or internet or firewall setting is wrong.
i have also tried to off the firewall and update but it still fail