DarthCoCoaPuffs

I just got some new three piece cranks (Masera Protocol), and I'm upgrading fomr once piece, which means I don't have much experience. I think the type of bottom bracket I have is American. But my problem is that I can't fit the cup and bearing into the bracket. The y are too big to fit inside. I'm not sure what my problem would be, othen than the fact that I might have gotten the wrong size for my frame. Here's some pics of my BB. Does this look like an american sized BB to you? Also the diameter of hole where the cups go in my BB is about 54mm (a little more than 2in.)