[Zope] my zope has got no pid!

Hello there, something's strange with my zope. I am running zope as my personal zope-user (at least I have started it this way) but I don't get any pid if I say "ps -a". And I cannot stop the server because the script tells me kill: xxxx - no such pid? What's wrong with it?? Is there any additional flag I have to set or unset in the standard-scripts? Thank you for your help, Steffen