I do not know the valid values of your continuous variables, but try something like this:
 
CLASS HARD_DRUGS INCOME2;
effectplot slicefit/  at(
                             AGE = 30
                             BMI = 25
                             MARI = 0
                             ALCOHOL = 1
                             CSMOKER = 1
                             HS = 1
                             ADHY2_ NHW = 0;
                             );
 
Whatever value you use on the right-hand side will determine the value at which the model is evaluated for the effectplot. The first continuous variable MODEL statement (AGG_MENT0 ) determines the continuous axis for the effect plot.