[Zope] Crash of ZopeHTTPserver

Hi All I am using web applications in production with 1.10.2+ZHTTPserver under RH Linux 5.2 What can I do to have Zope s own server work continuously, without manual re-starts every day? At the begining I did not broke this server but now the delais before crash is growing :( Is the zope db corrupt? Hope your help, FR. PS : I am testing 2.0a but not in production ....