What are the chances to get B2 visa after it being canceled?

[snow01]

While on a visit to the states, 5 years ago, I applied for change of status from B2 to Student but it was rejected. I went back to my home country after the refusal and applied for a student visa. They canceled my B2 visa stating that "I do not meet the criteria for the visa category". They refused my student visa as well. Now, I am a permanent resident of Canada with a full time job. Do you think it is the right time to apply for B2 right now? My family(mother and siblings) lives in the states and recently there's been an emergency in the family and I want to visit them as soon as possible.

Thanks in advance!