Server 29 works normally. Did you upgrade the app to the latest version(1.5.0)? If not, please upgrade it to 1.5.0 and try again. Or you can try to delete it and reinstall it. If you still cannot login, please tell us your dragon account name, we will check for you.
Can you login that account by 3G? I've checked your account, that account is working without problem. If you can use 3G, please try to turn off your wifi and turn it on.