SD memory card locks when repalcing a Nokia 5300?

Hi,
My Nokia 5300 was defected so we had to replace it. We got a new Nokia 5300.
The only problem now is that it requires a password when trying to access the memory card. Needless to say that I never had a password on the card with the original phone. None of the default passwords provided by T-Mobile (our phone company that provided the phone) could unlock the card.
Does anybody have a way of unlocking this password ?

oyoy
September 2008