Hmm,
command Line is something with difficulty. I also have many attempts until it works.
I think it shoult be change in the one of the next versions to work better with all Operating Systems, because it is important that it works fine, when you will indexing frequently Content Sites daily with Cron jobs or Windows Tasks.
Read this:
http://www.phpdig.net/showthread.php?s=&threadid=56
-Roland-