"Fast" (as in fasting, not fast quick :D) Cure for Depression by Dr Bilal Philips of Islamic Online University. ~ In sha Allah it works when one wants it to, and do it (successfully) with Allah's Grace & Mercy & Help.
In the past people learned Islam from the behavior of Muslims. But today we have to tell people "Don't judge Islam by the actions of the Muslims." Islam is not what Muslims do, but what they are supposed to do.
When we pray, we may not see the result today, but the benefit is there, so believe the answer is on the way! It may be that Allah wants you to keep praying for a thing to increase your DISCIPLINE, SABR (patience) and TAQWA.