Eseries / Communicators :: Unable To Format SD Card After Encryption Error?

I encrypted my memory card, worked ok for months. Today I showed a buddy of mine the encryption application, which asked if the memory card should be encrypted (encryption was already enabled). No Keyfiles/Passwords where asked for. The Phone crashed after that (hard reset after 5 hours). So the card is now encrypted, but there appears to be no valid key file on the device... So we have the usual issue: encrypted card, no keyfile or password.My problem is different in the following aspect: I don't want to recover any data - I just want to reformat the card and use my last (weekly) backup. However the phone won't let me do this. The following steps were taken to solve this issue without success:A complete Restore using the PC Suite does not restore any memory card contents or keys. The memory card stays "corrupted", encrypted and unwritable."Format Memory Card" says "card corrupted". Upon issuing the format request it says "Another application is using this memory card. Proceed" (which I confirm, as I suppose the crypto driver grabs the device) and then the program does nothing. It returns to the starting screen with "memory card corrupted".ReEnabling Encryption with a different key keeps saying that "No keys found", even after setting a new one. Sidenote: Even with a new key the card can't be formatted, as described above.The Phone was reset (using *#7370#, the 3+*+Green never worked on my phone) to factory defaults. Still the card was correctly recognized as encrypted and remained unusable as described above.Using a PC to format the memory card fails, as only the first 512kB appear to be writable (using dd under linux to write sequential zeroes). Despite writing this zero-dump, the phone still recognizes the card as encrypted, which implies that data on the card survived that crude zeroing attempt. Interestingly enough I can create a FAT32 Filesystem on these 512KB (not quick format), which appears to have no effect on the phone considering the card encrypted...The card is ok, since it was only removed after the problem occured. This must be an encryption issue. I suspect that the "Read Only" Password was set on the SD Card (hardware side, not E71 software) and hence all read/write operations are declined by the card.Is there any way to actually reset the encryption state of this card? As I previously said: I am not trying to recover any data, I just want a cleanly formatted microSD card..