Why is Ubuntu One synchronization not working?

Question

Many days ubuntuone synchronisation is not working. I have Ubuntu 11.04 amd64.

If I do this then:

javier@pc-ubuntu:~$ u1sdtool --status 
State: LOCAL_RESCAN
    connection: Not User With Network
    description: doing local rescan
    is_connected: False
    is_error: False
    is_online: False
    queues: WORKING

javier@pc-ubuntu:~$ ps -C ubuntuone-syncdaemon
  PID TTY          TIME CMD
javier@pc-ubuntu:~$ u1sdtool --connect
javier@pc-ubuntu:~$ ps -C ubuntuone-syncdaemon
  PID TTY          TIME CMD
 3240 ?        00:00:03 ubuntuone-syncd
javier@pc-ubuntu:~$ u1sdtool --status 
State: LOCAL_RESCAN
    connection: Not User With Network
    description: doing local rescan
    is_connected: False
    is_error: False
    is_online: False
    queues: WORKING

javier@pc-ubuntu:~$ ps -C ubuntuone-syncdaemon
  PID TTY          TIME CMD

What can I do?

I have a plan Music Streaming with 20G storage, but I don't happy because very days ubuntuone synchronisation not working for me.