Please confirm the following:
1. For Exchange 2007 (since it is 64bit) you must install the Mining tool on a 64bit Server other than the Exchange Server. (Same goes for Exchange 2003 32bit on a 32bit ser
2. The server with the Mining tool must exist in the same Domain as the Exchange Server.
3. The account being used for the mining tool must have a mailbox that resides on the Exchange Server where the Database originated from.
4. For Administrative use, a group named ExchangeDBMineAdmins must be created in Active Directory and configured with Administrators who wish to see more than just their own mailbox.