[Zope] error message PANIC(300) at startup

[Jessica Niewint]

When I try to start Zope-2.5.1  (after an installation without any error 
message on linux) I got the following error-message:

PANIC(300) z2 Startup exception
Traceback (innermost last):
  File /usr/local/etc/Zope-2.5.1.-linux2-x86/z2.py line 690, in ?
IOError:[Errno 13] Permission denied: 
'/usr/loca/etc/Zope-2.5.1-linux2-x86/var/Z2.pid'

When I have a look at the directory Zope-2.5.1-linux2-x86/var/ the Z2.pid 
is missing... what can I do ?

Thankx