I tried this version “openwrt-xe300-3.201-0322.tar” but cannot login to luci pages.
It stuck at login page even if the password is correct.
I can log in with ssh.
Solved the problem by using firmware version beta 4.
Seemed it was caused by something when installing Luci (the luci system was partially installed, several files were gone.). I found the problem by ssh.
Anyway, I totally re-imaged the device and reinstalled all packages.
Now it works well.