zen-installer problem

Hi, Getting the following error when using zen-installer Novell.Zenworks.Zmd.Public.ZenException: A transaction is already in progress The story is short. I have started zen-installer as normal user selected 3 packages to isntall. After ca 5min during which zen-installer has checked the dependencies etc. an error windows opens to tell me that I do not have permissions to install software. I close the installer, login as root, start the zen-installer choose the 3 packages click install to the error Novell.Zenworks.Zmd.Public.ZenException: A transaction is already in progress It seems serious because now I am not able to install any software. Any suggestions? thanks in advance Eryk