nook key generation from name & cc#

[bayerlad]

I have tried every combination that I can think of to generate the Nook key to remove the DRM without success. I have read about a correction for the epub that can sometimes gets corrupted? I assume also that if I change the credit card, the library will retain the key combination that the books were bought with and not the new credit card? I have seen several posts where the combination of name and cc# do not work correctly to generate the proper key. Is there a fix for this problem? I would appreciate any help that can aim me in the right direction!