newbie, solving an equation numerically



I'm trying to make Maxima solve the following equation

h1(s):=1/(1+tau[1]*s);
h2(s):=1/(1+tau[2]*s);
x(s):=1/s;
tau[1]:33e-6;
tau[2]:33e-6;
solve(ilt(h1(s)*h2(s)*x(s),s,t)=0.1,t);

unfortunately Maxima just shows me the transcendent equation I want it to 
solve?

How should I proceed now?

regards,?
hugo