Configure node on separate server instance than Drupal

I need to implement Mobile Chat via node js having Drupal as backened for application.

Facing following issues while integrating nodejs integration module :

1. Every time I try to configure settings in nodejs integration module, site hangs up and it does not work at all untill I remove nodejs directory from root.

2. Is it possible to run Nodejs Server in a Separate Instance other than instance where drupal is deployed?
Since nodejs server needs more memory, I need to install it on separate server.

This is my config.js file settings look like:

backendSettings = {
"scheme":"http",
"host":"localhost",
"port":3000,
"key":"/path/to/key/file",
"cert":"/path/to/cert/file",
"resource":"/socket.io",
"publishUrl":"publish",
"serviceKey":"testing",
"backend":{
"port":80,
"host":"localhost",
"messagePath":"/drupal7/nodejs/message"},
"clientsCanWriteToChannels":true,
"clientsCanWriteToClients":true,
"extensions":"",
"debug":true,
"transports":["websocket",
"flashsocket",
"htmlfile",
"xhr-polling",
"polling"],
"jsMinification":true,
"jsEtag":true,
"logLevel":1
};