It looks like the vault may have become corrupted. What version of secureaccess are you using? If you are using version 3 you can try using the vault repair feature.
SecureAccess V3 Repair Vault Feature
http://kb.sandisk.com/app/answers/detail/a_id/18012/
If you have some other version of secureaccess let us know and we can see if there is something similar for that version that may help recover the vault.
