Why am I receiving a 404 when trying to render a page through node.js?

Question

I'm trying to use req.params to make my landing page dynamic after logging in. When I try to render the profile page, it says "404 Not Found". Here's my router:

var express = require('express');
var router = express.Router();
var mongoose = require('mongoose');


/* GET profile home page. */
router.get('/', function(req, res, next) {
  res.render('profile', {name: req.params.name})
}); 

module.exports = router 

And a portion of my app.js file;

var profileRouter = require('./app_server/routes/profile');

app.use('/profile', profileRouter);