How to optimize a fuction whith SCE-UA algorithm?

Hello Guys,

I'm trying to optimize a function using the SCE-UA algorithm, but I am not getting success. Could someone help me? I am sending function and the algorithm.

These are the optimal values of the function using linear programming (linprog)

str = 1963.269596; % range 500 - 4000

pes = 2.2925763; % range 1 - 10

crec = 0.381174166; % range 0.01 - 0.64

Thank you in advance.

https://drive.google.com/folderview?id=0B9JmyPHF_ZMPV3YwVnhva1A2Vk0&usp=sharing