SD card wont format after partitioning with Aparted

I have a LG MS500 with metro pcs, i had used aparted to partion my card and link files to my sd card. I had a glitch trying to add a boot image and had to factory reset my phone in order to get it to work again, now my memory card will read what was on the external storage partion of the card, but it cant be modified,and ive tried to format the card with numerous apps. when i attach the phone to the pc, it will show the card and i can access it, but any formatting programs wont see the card, any suggestions???