Rohit,
Is this in Chapter 4 with 2 monsters throwing fireballs at you?
Crash wrote these:
Go toward the left path toward the graveyards. Get the Mjolnir hammer from the statue. On the way back to the log, you will face couple of fire-spitting monsters. Throw it toward them before they're able to spit fireballs toward you. Place the hammer on the pedestal. The crows will pull you up to the sky again. This time they will drop you in front of a big locked door.
Another walkthrough states:
Place hammer Mojolnir in the stone table. Walk back to the trunk , along the way back some monsters spit fireballs to you, throw the Mjolnir to the monster before he spit the fireball. Walk left from the trunk in the tunnel from a cave.