Revocation of Probation

I was convicted of attempting to acquisition or administration of narcotic drugs a class 6 felony and was put on probation back in 2009. I was ordered 24 hrs of community service, a drug and alcohol screening and restitution. I did the alcohol screening and classes for 56 hours but it was for another charge. I only completed 9 hours of community service and was unable to complete the rest due to personal problems. I haven't paid any restitution fees due to the fact that I haven't had a job or income since then. Will the screening and classes from the other case count towards this case, and should I try to finish my community service before I attend court? What should I be expecting when I go to court?