solve function only returns equation equal to zero

[fuz]

Trying to use the solve function, and can get it to work fine for easy functions. Trying to solve for a harder one and all it does is return the function solved for zero. Is there a point when the calculator gives up? Why not just error out? The equation is
solve(p=e^(-(1/4)*w^(5/12))*w^(3/2) + (4*H*w/(C*S))*(1-e^(-(1/25)*w^(5/9))),w)
e=exponential
trying to solve for w

Thanks