ldap crisis

Thanks for your postings. I am in my third day at a new job – switching from primarily a Windows network to a Mac network. Yesterday, we had a power outage/surge, the battery backup failed on our OS X server, and upon restart the LDAP directory is gone/corrupted. We had no secondary (backup) or replica server running (though this had happened twice I guess in the last year or so). I have these questions:

1. How do I create a clean, new network database? I am always getting a message that my current directory is local only, not network.
2. How can I re-import my accounts?

Thanks so much!

dwb