Can't connect wifi after change channel and mode in router

I have a problem with wifi connection. I've been using arch linux for awhile now and my wireless connection is worked well until I setting my router via browser. I change my router channel from 6 to 1 and wireless mode to 802.11n. Usually in windows it will disconnected for awhile then it will connected again, but with arch linux its just disconnected and can't connect anymore. My AP's name before is "olympian hermes", but now it change to "olympian+hermes". in my router setting the name doesn't change (still: olympian hermes).
I've using windows to test if there is problem with my router but it's worked fine in windows. After that i'm using my android phone to make a wifi, but it still didn't work with another network.
I hope someone could help me, thanks in advance.
Here is my journalnetcl -xn output:
Sep 08 07:30:46 arch network[2233]: Starting network profile 'wlp5s0-olympianxa0hermes'...
Sep 08 07:30:46 arch kernel: IPv6: ADDRCONF(NETDEV_UP): wlp5s0: link is not ready
Sep 08 07:31:02 arch network[2233]: WPA association/authentication failed for interface 'wlp5s0'
Sep 08 07:31:02 arch network[2233]: Failed to bring the network up for profile 'wlp5s0-olympianxa0hermes'
Sep 08 07:31:02 arch systemd[1]: netctl@wlp5s0\x2dolympianxa0hermes.service: main process exited, code=exited, status=1/FAILURE
Sep 08 07:31:02 arch systemd[1]: Failed to start Networking for netctl profile wlp5s0-olympianxa0hermes.
-- Subject: Unit netctl@wlp5s0\x2dolympianxa0hermes.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- Documentation: http://www.freedesktop.org/wiki/Software/systemd/catalog/be02cf6855d2428ba40df7e9d022f03d
-- Unit netctl@wlp5s0\x2dolympianxa0hermes.service has failed.
-- The result is failed.
Sep 08 07:31:02 arch systemd[1]: Unit netctl@wlp5s0\x2dolympianxa0hermes.service entered failed state.
Sep 08 07:31:03 arch sudo[2168]: pam_unix(sudo:session): session closed for user root
Sep 08 07:31:11 arch sudo[2716]: wenhui : TTY=pts/0 ; PWD=/home/wenhui ; USER=root ; COMMAND=/usr/bin/journalctl -xn
Sep 08 07:31:11 arch sudo[2716]: pam_unix(sudo:session): session opened for user root by wenhui(uid=0)
Last edited by hermesolympian (2013-09-08 06:43:09)

uhhh theres somthing(s) screwy in your post or maybe its just my screwy brane(quite possible)
go over the wiki line by linehttps://wiki.archlinux.org/index.php/Netctl
be precise and good luck!

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