CMAQ-DDM Sensinput Reaction Rates

Hi,
I have a question about the sensinput data. I would like generate separately sensitivities to multiple reaction rates, it works if define in one, but not as separate. Please advise.

Works***************

RATE1
RATE
REACTION
R1
R2

END

Does not Work***************

RATE1
RATE
REACTION
R1

RATE2
RATE
REACTION
R2

END