NGINX not executing php code in second site from a different folder

Hello,

Our client have NGINX running on ubuntu, the main site is running wordpress perfectly in www.domain.com, but now we installed another PHP app in a folder /app, so when visiting www.domain.com/app i can see all the content from the app, but cant execute PHP code, so inside the app all the code is in this format:

<? echo $semana_actual[‘total’] ?>

---

We are using this setup:

---

# You may add here your
# server {
#	...
# }
# statements for each of your virtual hosts to this file

##
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# http://wiki.nginx.org/Pitfalls
# http://wiki.nginx.org/QuickStart
# http://wiki.nginx.org/Configuration
#
# Generally, you will want to move this file somewhere, and start with a clean
# file but keep this around for reference. Or just disable in sites-enabled.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

server {
	listen 80 default_server;
	listen [::]:80 default_server ipv6only=on;

	root /var/www/html;
	index index.html index.php index.htm;

	# Make site accessible from http://localhost/
	server_name cercis.cl;

	location / {
                # try_files $uri $uri/ =404;
                try_files $uri $uri/ /index.php?q=$uri&$args;
        }
        
        
    location /app {
                try_files $uri $uri/  /app/index.php?q=$uri&$args;
    }

        
        
	# Only for nginx-naxsi used with nginx-naxsi-ui : process denied requests
	#location /RequestDenied {
	#	proxy_pass http://127.0.0.1:8080;    
	#}

	error_page 404 /404.html;
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }

    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_read_timeout 300;
 
    }

	# deny access to .htaccess files, if Apache's document root
	# concurs with nginx's one
	#
	#location ~ /\.ht {
	#	deny all;
	#}
}


# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
#	listen 8000;
#	listen somename:8080;
#	server_name somename alias another.alias;
#	root html;
#	index index.html index.htm;
#
#	location / {
#		try_files $uri $uri/ =404;
#	}
#}


# HTTPS server
#
#server {
#	listen 443;
#	server_name localhost;
#
#	root html;
#	index index.html index.htm;
#
#	ssl on;
#	ssl_certificate cert.pem;
#	ssl_certificate_key cert.key;
#
#	ssl_session_timeout 5m;
#
#	ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
#	ssl_ciphers "HIGH:!aNULL:!MD5 or HIGH:!aNULL:!MD5:!3DES";
#	ssl_prefer_server_ciphers on;
#
#	location / {
#		try_files $uri $uri/ =404;
#	}
#}