Skill Level 0,A,B all qualifies for CEC. If you graduated from a Canadian University, you can apply under graduate stream in which you need 1yr of working experience @ Skill 0, A, B jobs.
Salary wouldn't be the main reason that your file does not qualify.
Salary can matter if its quite apparent to the VO that you are cooking up your job description/title, and people in the same profession/job are earning much higher.
Visit this website. Over there you can find the mean, upper and lower ranges of your NOC in your locality.