Xperia PLAY :: Phone Wont Recognize 32gb SD Card?

i just bought a used xperia play and a new 32gb sd card class 4 (adata). the memory works fine in my laptop but when i put it in the phone it wont do anything, it wont let me mount or anything, its like there isn't anything insde. i already read that the back cover has to be placed proporly so it is pressing the little white switch, the cover is properly placed. okay just now i used the update service program and it says it has modified content, okay i know its a used phone so it is totaly possible but how to i get it back to original firmware or software or whatever, im new to andriod so what am i suppose to do (already have PC companion and update service), sorry for my bad grammer but right now im fricking out! this is the phone of my dreams and i can't enjoy it because of the sd card!! right now im going to restore to factory but i fear it will brick my phone since i got that "modified content" message.

in the worst case senario, say the sd reader is broken, how much does sony charge to fix it? do they even fix it? if they do, do thay have it in mexico?details: i formated the micro sd card on my laptop on FAT 32