Kumar
The reason why don't believe in the hereafter and anything to do with Doomsday is due to your religious beliefs, which you are entitled to do so, as you are excercising the gift of CHOICE. However, what you must also remember is that you have also been prophesised in the Qur'aan:
034.003 The Unbelievers say, "Never to us will come the Hour": Say, "Nay! but most surely, by my Lord, it will come upon you;- by Him Who knows the unseen,- from Whom is not hidden the least little atom in the heavens or on earth: Nor is there anything less than that, or greater, but is in the Record Perspicuous:
030.012 On the Day that the Hour will be established, the guilty will be struck dumb with despair.
030.013 No intercessor will they have among their "Partners" and they will (themselves) reject their "Partners".
074.041 And (ask) of the Sinners:
074.042 "What led you into Hell Fire?"
074.043 They will say: "We were not of those who prayed;
074.044 "Nor were we of those who fed the indigent;
074.045 "But we used to talk vanities with vain talkers;
074.046 "And we used to deny the Day of Judgment,
074.047 "Until there came to us (the Hour) that is certain."
Whether you accept it or not, the fact still remains that it WILL come.
Finally:
027.004 As to those who believe not in the Hereafter, We have made their deeds pleasing in their eyes; and so they wander about in distraction.
027.005 Such are they for whom a grievous Penalty is (waiting); and in the Hereafter theirs will be the greatest loss.
The signs for Doomsday are universal. Even Nostradamus knew this and he surely was NO Muslim.