You need to run a simple diganostic file to find out what your PHP settings are. I have a quick tutorial on my site. As well, check out the www.expertzzz.forum and do a quick search. A bunch of stuff will turn up there. Another place is modmysite.com.
Well, there seems to be a few problems with scripts. I get a blank page also. Cannot get past the part to even set up Orca. This may not be the place to post this, but have not been able to get the Cron jobs to run right also. Have tried ever cron configuration that i can possibly think of, along with different permissions. I am a little dissappointed because i read through these forum post and i do not really see any support answers from the powers to be of these scripts.