[Zope] Again rc

Hi, I start Zope as daemon (-Z option) and now I've the following problem : http://localhost/Zope works (through Apache) but http://localhost:8080 doesn't work, it says that the server is down. While Zope is running (see with Apache) What am I doing wrong? Is there something I should know? Is there somewhere a port I've to activate in Linux? Thanks in advance! Regards, Tom.