Why our Du'aa's are NOT Answered ???

IBRAHEEM IBN ADHAM (may Allah have mercy on him) - a third century scholar, a teacher and a companion of Sufyaan ath-Thawree (r.a), was asked about the saying of Allah - the Most High: 
"AND YOUR LORD SAYS: 'CALL ON ME I WILL ANSWER YOUR PRAYER..." [Surah al-Ghaafir 40:60] 

"We supplicate and we are not answered." 

So he said to them... 
* You know Allah, Yet you do not obey Him,
* You recite the Qur'aan, Yet do not act according to it, 
* You know Shaytaan (Devil), Yet you have agreed with him,
* You proclaim that you love the Messenger of Allah (saws), Yet you abandon his Sunnah,
* You proclaim your love for Paradise, Yet you do not act to gain it,
* You proclaim your fear for the Fire, Yet you do not prevent yourselves from sins,
* You say "Indeed death is true", Yet you have not prepared for it,
* You engage yourselves with finding faults with others, Yet you do not look at your faults,
* You eat of that which Allah has provided for you, Yet you do not thank Him,

* You bury your dead, Yet you do not take a lesson from it. 

[Taken from Khushoo fis-Salaat (p.62) of Ibn Rajab al-Hanbalee]