Temperature profile can't be shown

Hi Im Farah. Now im dealing with simulation for a biomass-gas stove and im focus on mixing between pyrolysis gas and air. But i have a problem with the energy balance.
In this model, i have 4 combustion reaction and confuse to input equation for heat source in the model.

as i know..heat source equation for each components are :
(HT_CH4*-R_CH4)
(HT_C2H6*-R_C2H6)
(HT_H2*-R_H2)
(HT_CO*-R_CO)

so that, at the heat source, i put the equation :
(HT_CH4*-R_CH4)+(HT_C2H6*-R_C2H6)+(HT_H2*-R_H2)+(HT_CO*-R_CO)

where HT is (example for CH4) : deltaHf_CH4+(hCO2(T[1/K])+2*hH2O(T[1/K]))-(hCO2(298)+2*hH2O(298))

for R_CH4 and other component, im using Eddy Dissipation model.

the problem is : i dont see the profil of temperature. Comsol just shown me the temperature as the initial temperature that i input.

Hope...anyone could help me.
Thankyou