Hi, I've been using 2.1.6 for a long time without any problem, using a home compiled python 1.5.2 Yesterday I've tried to upgrade to 2.3.0a1 the following way: export each and every home made sites and products (ZClasses) from 2.1.6 stop 2.1.6 install 2.3.0a1 and start it import each and every exported sites and products (I've not tried using the same Data.fs as 2.1.6) In all instances of a ZClass I've made, I used to (in 2.1.6) call a DTML method from my browser which was protected in a way to display the authentication box, allowing me to enter my username and password. The username and password should give me a role created in the ZClass instance constructor, this role is allowed to create and modify some subobjects (another ZClass) Since I've installed 2.3.0a1 then when I tell my browser to "call" the DTML method the authentication box appears but I'm not able to authenticate myself: it always give me an unauthorized exception. Looking at zope log it gives me a 401 error on the DTML method. If I modify this method to do nothing but return plain text the problem persists. I've checked several times the username and password and I'm sure I've typed them correctly. In one instance of my ZClass I've tried to give all permissions to the created role, but with no luck. I've finally stopped 2.3.0a1 and relaunched the 2.1.6. Does someone have any idea of where the problem may come from ? Should I try to use the same Data.fs of 2.1.6 ? Should I try to use 2.2.5 instead of 2.3.0a1 (I'd like to be able to use PythonScripts) ? Thanks in advance. Jerome ALET - alet@unice.fr - http://cortex.unice.fr/~jerome Fac de Medecine de Nice http://wwwmed.unice.fr Tel: (+33) 4 93 37 76 30 Fax: (+33) 4 93 53 15 15 28 Avenue de Valombrose - 06107 NICE Cedex 2 - FRANCE