that is weird, i mean i have already one site runing on this server.i just add new site and new one is not work. where i have to look at for seconde site?
I do not recall right off where that plug puts the config files, but check under /etc/nginx/sites-enabled and it should be a symlink back to the config file. Open that and under the location /, it should have proxy_host http://domain.com:8081/ . Also, check the error logs under /var/log/nginx/error.log (again, might be different location/filename) as it may show more info there.
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