Hi again I played arround with threads and the interval options of Zope. I've started Zope with "-t 13" and "-i 10". Somehow this seems to help somewhat with concurrent access. Now I'd like to know why. I couldn't find a clear explanation. Maybe somebody can help and give me insight. If there are other solutions / hints out there I'm interested! Oliver -- GMX - Die Kommunikationsplattform im Internet. http://www.gmx.net