I'm trying to figure out how to use ZClasses and I found myself having problems with the manage_changeProperties for a property of the Class I made. I followed the ZDG ZClass tutorial and created the CDProduct the CDClass, set the property sheet and the class seems to be working ok but I can not for my life get the manage_changeProperties to update the properties of the instance of myCD in the root folder. I can change the properties with the Properties tab of the instance but not through DTML with the line: <dtml-call "myCD.manage_changeProperites({'title':'this title', 'artist':'this artist', 'description':'this desc'})"> It doesn't give me an error or anything it just dont change any property values. Please Help, Sincerely, Mats Nordgren