[Zope] Pb with lot of files in publication

We use zope 1.10.2 (under linux Red hat 5.2 with Apache 1.3.3) and we publish html pages with communicator (composer v4.03 or 4.5 under windows 98). When publishing a number of GIF files greather than 100 (for example 121) the publication stop on a file and we have the message "Ce document ne contient aucune données" (document without any data). But this file is not empty ! And if we publish the 21 last files, it is OK. Is there a limit in publishing ? Please help... Thanks