I'm new to Linux. I installed Ubuntu 11.04 on a partition and I love it, but Ubuntu One does not work. I created a free account and a directory Ubuntu One appeared automatically, as expected. I copied there some files and a couple of directories, just text files, therefore very light. U1 tries to sync, but fails and keeps on trying again. When I close the session I must force exit, because it is still trying. My router has a firewall: can it cause the failure? When I use Windows, on the other partiton, I have no problem with Dropbox.