sd card mounted and read only......anyone have any ideas?

[unsane]

So the other night I took out my SD card (8 gig) the o.e.m. one that came with the phone....anyway I put it in my home laptop and swapped some pics from the card to the laptop.....I put it back in and rebooted the evo.......ever since then I have an SD icon with a question mark on it in my task bar and if says SD card mounted read only tap here .......I've tapped it took it out and reinstalled it......rebooted my phone several times.....can anyone help me out on this, as I can't do a whole lot when the phone won't write to the SD card.....thanks in advance......