Screwdriver doesn't fit screw described in Step 4 of guide
The Philips #00 screwdriver that I bought from iFixIt isn't fitting the 1.5mm screw described in step 4 of the power button replacement guide. When I attempt to use it on this screw it feels like it's going to strip the head (I can only imagine that to be a nightmare), so I'm wary of putting any force to it. It's hard to tell, but under magnification, it almost looks like the #00 is too small (?) for this screw.
Am I doing something wrong here, or do I just have the wrong screwdriver size?