express-namespace and express-resource wont allow map

I'm trying to creating a custom map for a resource,

app.namespace('/v1', function(){
  var sessionResource = app.resource('session', require('./routes/v1/session'));
  sessionResource.map('/test', sessionResource.index);  
});

the maps breaks as follow, however without the custom map the ns and the resource work smoothly

/home/kuryaki/piitri/newApi/node_modules/express-resource/index.js:125
  if ('/' == path[0]) path = path.substr(1);
                 ^
    TypeError: Cannot read property '0' of undefined
        at Resource.map (/home/kuryaki/piitri/newApi/node_modules/express-resource/index.js:125:18)
        at HTTPServer.<anonymous> (/home/kuryaki/piitri/newApi/app.js:44:31)
        at HTTPServer.exports.namespace (/home/kuryaki/piitri/newApi/node_modules/express-namespace/index.js:31:6)
        at Object.<anonymous> (/home/kuryaki/piitri/newApi/app.js:42:5)
        at Module._compile (module.js:449:26)
        at Object.Module._extensions..js (module.js:467:10)
        at Module.load (module.js:356:32)
        at Function.Module._load (module.js:312:12)
        at Module.runMain (module.js:492:10)
        at process.startup.processNextTick.process._tickCallback (node.js:244:9)

the index method exists thats how i actually test it

GET /v1/session at localhost

i have tried with node v0.6.14, v0.8.4 and v0.9.0pre and none work am i doing something wrong?