Format memory

You have just one problem here:
Switch your phone on, if you can't because you have forgotten your PIN number, try this;
Try typing #pwd# and then send (green button). It will reset your password to the the last 4 digits of your phone number.
Then you can reset your password back to what ever one you can remember.

After that you can formay your memory card.

there is an application to identify forgotten MMC password. install MMCpwd application and find it. its the only easy way.