Need help with ACT Pressure Plate N015

[97240via]

I am redoing my clutch now. I bought the clutch and pressure plate separately. The pressure plate came in box saying N-015, which is the correct one for SR20det. However, no matter how i try to put it on, it just can't go in at all. I compare the size of the ACT to stock, it is a bit bigger. I sent the pressure plate to ACT, and they checked it and say it is the correct one. I know a lot of people use ACT on the board, anyone has the similar experience? Thanks.