When I click on connect button in my ubuntu one client it again says connect not disconnect.
Not sure about the exact issue you're facing, but it sounds familiar. What did help me was to do the following in a Terminal:
The first will quit the program, the second will start it and the third connect it. I have had error messages whilst doing so, but I've found that it seems to need me to do this to connect eventually. Also, if you have many folders and sub-folders and files, it will first need to scan all files before connecting to your Ubuntu, so whilst it might remain on stating "connect", it might in fact be preparing Ubuntu One to Connect. It has taken me up to an hour or so to Connect...
There is also ubuntuone-indicator you could install, and magicicada or something. sudo apt-get install *
Both give you more details as to what your client is actually doing!
Hope this helps, and hope someone who knows about Ubuntu will clarify/confirm what I wrote :)
I have a similar issue. Ubuntu One client does not seem to connect. I tried -t and -c options repeatedly but after some waiting the status just becomes:
State: LOCAL_RESCAN connection: With User With Network description: doing local rescan is_connected: False is_error: False is_online: False queues: WORKING_ON_BOTH
And this takes forever (I have left it on for several days, but no change). Does not seem to connect anymore. I am lost....