Yes, I am currently experiencing a problem with Lotus Notes (6.5.3) and CallPilot Desktop Messaging Client (4.04.04.12): When Notes "global address" book is selected as the directory to use while attempting to address a new CallPilot Desktop message, it fails to open the addressbook and effectively blocks any other attempts, due to the fact that the DskTpMsg Client always attempts to use the last addressbook selected. At this point, the only recourse is to uninstall, then reinstall the DskTpMsg client, to be able to use the Client on one of the working CP directories. I've been chasing this problem for several months now, primarily due to limited support from our vendor (un-named). Currently I am working with our Lotus Notes Administrator on a developmental Notes server with CP DskTpMsg. to try to resolve this problem. The Dev-Notes server is running 6.5.5, and the CPDskTPMsg appears to work fine with the Global Address book, though the Notes Admin can't explain why this is. Does problem scenario listed above, match your situation?