I renamed your thread to reflect that you have a Media Card problem, not a SIM card problem. It's likely that the camera either damaged the formatting on the card, or put some files on the card that make the BlackBerry think it's damaged. If you don't mind losing the contents of the card, you can reformat it, either in the BlackBerry or in a PC using an adapter. Short of reformatting the card, you can also run the chkdsk utility in a PC, again using an adapter for the card.
It is not clear how you microsd card got damanged, but i suggest the following.
Enable Mass Storage Mode
In windows, right mouse click and choose properties then click on Tools tab. Run Error checking. Hopefully that will fix it. If not, you will need to reformat as JeffH suggests.