Taking Out Mother Board Problem

Hi ifixit,

I tried to take out the mother board of my macbook pro to fix left speaker after unscrew all necessary screws. But it didn't come out. I think, some sticky things holds the speaker. So is there any solution for it? Can i heat it to get reed from sticky things?

I took out all seven screws but still there is some stick things. When i try to pull logic board, i can feel it. The thing is not missed screw. There is something between speaker and upper case.