fixed collection rename bug

lib/server.js

@@ -35,7 +35,7 @@ var middleware = function (req, res, next) {
  */
 
 middleware.listen = function (callback) {
-  var server = this.server = express.createServer(function (req, res, next) {    
+  var server = this.server = express.createServer(function (req, res, next) {
     // by default pause the request
     req.pause();
     
@@ -136,7 +136,7 @@ middleware.listen = function (callback) {
       res.statusCode = err.status || 400;
       res.send({error: err});
     } else {
-      next(err);
+      res.send(err);
     }
   });