[Zope] help! too many open files (zope-2.3.1)

[Bak @ kedai]

hi all
i've been running zope-2.3.1 for quite some time now.  everything went well.
but
the isp had a power failure today.  and after that i kept getting too many
open files, esp with access of mailhost, localfs, etc.

i've increased the file-max in /proc/sys/fs/file-max.  ulimit -a tells me
that i can only have 1024 file open.

if i restart zope, everything's ok.  but the problem will appear again

is this the problem?

setup -
zope-2.3.1
rh 6.2
zeo-0.5

thanks