My visa is B1 / B2 two years

Please friends I need to make some inquiry, I work with a government agency. I was granted a two years visiting visa to the United state multiple entry to attend a short course sponsored by the government agency I work for here in nigeria due to some family crisis I could not attend the short course that was to take place 3th October 2013 in Kansas state, now am planning of going on vacation February 2014. My questions is since the primary purpose of my visa is to attend the short course which I missed, can I still travel to the United state on vacation to another state for vacation without difficulties at the point of Entry. Please I need response to this immediately to enable me plan for my vacation

Please friends I need make some inquiry, I work with a government agency. I was granted a two years visiting visa to the United state multiple entry to attend a short course sponsored by the government agency I work for here in nigeria due to some family crisis I could not attend the short course that was to take place 3th October 2013 in Kansas state, now am planning of going on vacation February 2014. My questions is since the primary purpose of my visa is to attend the short course which I missed, can I still travel to the United state on vacation to another state for vacation without difficulties at the point of Entry. Please I need response to this immediately to enable me plan for my vacation