Hi,
as far as I know ( older post here in forum) you should type the command line using case sensitive, like you typed on your Subject!
![Cheesy :D](http://www.fsdreamteam.com/forum/Smileys/default/cheesy.gif)
If I am not wrong should be entered as:
airportCacheOptimizeSearch
airportCacheMaxBGLSizeBytes
Hope I could help, Pit.