I cannot get example (from Iron Foundry) running

On this github (https://github.com/IronFoundry/if_sample_apps/tree/master/MongoWorkerClusterSample/QueryWorker)
I'm trying to deploy the QueryWorker example.

This is the manifest.yml file:

applications:
- name: query_worker
  buildpack: https://github.com/cloudfoundry-community/.net-buildpack
  stack: lucid64
  command: QueryWorker.exe 
  no-route: true

But I get an error like:

2015-04-29T20:18:32.000+00:00 [API] OUT Created app with guid 3bd7adbf-fd9d-48e7-bb41-e79f8a53dfc1
2015-04-29T20:19:36.000+00:00 [DEA] OUT Starting app instance (index 0) with guid 3bd7adbf-fd9d-48e7-bb41-e79f8a53dfc1
2015-04-29T20:20:55.000+00:00 [DEA] OUT Starting app instance (index 0) with guid 3bd7adbf-fd9d-48e7-bb41-e79f8a53dfc1
2015-04-29T20:18:52.000+00:00 [STG] OUT -----> Installing Mozilla certificate data to .config/.mono/certs (1.8s)
2015-04-29T20:19:40.000+00:00 [API] OUT App instance exited with guid 3bd7adbf-fd9d-48e7-bb41-e79f8a53dfc1 payload: {"cc_partition"=>"default", "droplet"=>"3bd7adbf-fd9d-48e7-bb41-e79f8a53dfc1", "version"=>"70c46bdc-5bc0-4ab2-ad41-5ba26d3ef63c", "instance"=>"f3e56d04ad6b4bd99e81ec17ff1ab7eb", "index"=>0, "reason"=>"CRASHED", "exit_status"=>127, "exit_description"=>"app instance exited", "crash_timestamp"=>1430338780}
2015-04-29T20:18:44.000+00:00 [DEA] OUT Got staging request for app with id 3bd7adbf-fd9d-48e7-bb41-e79f8a53dfc1
2015-04-29T20:18:48.000+00:00 [STG] OUT

Do you have any hint?

cloudfoundry-community / .net-buildpack

I cannot get example (from Iron Foundry) running #42