[Zope-dev] more than one user: zope 'hangs'

Hello, We have got a funny problem in Zope: if user A issues a long-running query user B also has to wait in the meantime - zope just waits for A's query to finish. We are using interbase as our database and GV Interbase Database Adapter 0.9.6 on a linux system. In the README it says 'threadsafety ... is set to 1 - threads may share the module but not connections' Somehow i suspect the problem lies there. Can anyone give me a hint on this problem? Thanks in advance, Stephan