The way to define variable correlated to ac simulation in .scs model

Greetings,

I would like to run AC sim in one test once in case of two sub-conditions

1) ac source1 active with acm1 = 1, ac source2 off with acm2=0

2) ac source1 off with acm1 = 0, ac source2 active with acm2=1

so i define such an ac_analysis.scs and load it the corner setup as

section ac_analysis

ac1 ac start=0.1 stop=10M dec=50 acm1=1 acm2=0

ac2 ac start=0.1 stop=10M dec=50 acm1=0 acm2=1

endsection ac_analysis

However, maestro can not recognize the difference of acm1 and acm2. So how i can improve the .scs model?

Thanks.