Twitter recently changed how it does feeds,  and so versions of Clockwise prior to the one just coming out (1.8) will not display Twitter feeds as of Twitter's change (#hashtags still work though), which occurred in the last week. Clockwise version 1.8 already has this corrected,is undergoing testing,  and will be available within 1-2 weeks (it also has many new enhancements). Sorry for the inconvenience.