may need a bit more practice and help

I'm wondering in RSpec if the previous tests pass before you move on to next test. That way, I can see that since Engineer and Conductor have already had their actions I do not need them again in MessageBoard. But then, I seem to get the wrong number of arguementts and don't exactly know what I should be passing in. 
![screenshot 2014-02-10 11 01 54](https://f.cloud.github.com/assets/3124481/2127971/213b7fe6-9275-11e3-9c4b-1bbfcda52de2.png)