Let's try to understand better your problem, but please do these tests I tell you: 1) Test both LastGo and Vagalume and tell me if this error happens with both clients. 2) open a terminal on your N900 and try this: mv /home/user/.config/LastGo/LastGo.conf /home/user/.config/LastGo/LastGo.conf.bak shortly: this renames the configuration file, so you'll have to import api key again, insert username/password again and a NEW SESSION KEY will be requested.