Now getting a 500:

Express 500 Error: notConnected

    at [object Object].executeCommand (/home/node/local/lib/node_modules/mongodb/lib/mongodb/db.js:708:41)
    at Collection.findOne (/home/node/local/lib/node_modules/mongodb/lib/mongodb/collection.js:753:11)
    at /home/node/local/lib/node_modules/connect-mongo/lib/connect-mongo.js:143:16
    at MongoStore._get_collection (/home/node/local/lib/node_modules/connect-mongo/lib/connect-mongo.js:92:19)
    at MongoStore.get (/home/node/local/lib/node_modules/connect-mongo/lib/connect-mongo.js:142:8)
    at Object.session [as handle] (/home/node/local/lib/node_modules/express/node_modules/connect/lib/middleware/session.js:319:11)
    at next (/home/node/local/lib/node_modules/express/node_modules/connect/lib/http.js:198:15)
    at IncomingMessage. (/home/node/local/lib/node_modules/express/node_modules/connect/lib/middleware/bodyParser.js:74:9)
    at IncomingMessage.emit (events.js:61:17)
    at HTTPParser.onMessageComplete (http.js:133:23)