Make sure that you're not creating a too big shared memory segment and that you're (apache) running with an uid that is allowed to create shared memory segments.
>From the apache configuration file: # . On HPUX you may not be able to use shared memory as nobody, and the # suggested workaround is to create a user www and use that user. # NOTE that some kernels refuse to setgid(Group) or semctl(IPC_SET) # when the value of (unsigned)Group is above 60000; hugs Luciano Rocha -- Luciano Rocha, [EMAIL PROTECTED] The trouble with computers is that they do what you tell them, not what you want. -- D. Cohen