I am coming from riak and redis where I never had an issue with this services starting, or to interact.
This is a pervasive problem with mongo and am rather clueless
Finally I got this is in a simple way..
open terminal and go to the mongodb location. In my case it is
e:\mongodb\bin>
and type the following command and press enter..
mongod --config e:\mongodb\mongo.config
Open another terminal and start the mongodb using
mongo.exe
Thats it.. you can use mongo