With the recent move by Twitter to support only clients that use its API version 1.1, Choqok has stopped updating feeds in its latest official build. There is frantic work going on in the background to get the support up and running but till its available via official channels here is a quick way to get Choqok working again.
For Ubuntu users, you can get Chokoq working by installing the latest build from this ppa:
https://launchpad.net/~pfoo/+archive/choqok/+packages
Here are the direct links to a working version of Choqok(click on the above link for the latest build):
32bit 64bit