X5 3.0 D air filter

Hi all :smile:

I'm newbie on this forum.
I'm looking for someone that explain me how should I change my X5 air filter.
I bought a silk-made air filter for best performance.:evillol:
This afternoon I removed the motor cover and unscrewed three screws to reach the air filter.
But now I don't be able to remove it to place the new one.:crying:
Somebody know how to do this?
Please help me.
Thanks in advance
Nik