Open directory restore failing

[Aussie John]

I have rebuilt our server and updated to 10.8 (previously 10.7).
When I try to restore the OD database i get the following error. (FYI DNS resolves).



mail:~ svradmin$ sudo slapconfig -restoredb /Volumes/Server\ HD/OD/nov\ 2012\ OD\ archive.sparseimage
2012-11-18 10:13:21 +0000 slapconfig -restoredb
2012-11-18 10:13:21 +0000 1 Mounting the archive
2012-11-18 10:13:21 +0000 command: /usr/bin/hdiutil attach /Volumes/Server HD/OD/nov 2012 OD archive.sparseimage -readonly
Enter disk image passphrase:
2012-11-18 10:13:28 +0000 command: /usr/bin/hdiutil attach -stdinpass /Volumes/Server HD/OD/nov 2012 OD archive.sparseimage -readonly
2012-11-18 10:13:30 +0000 Error: Command failed with exit code 1: out=, errmsg=hdiutil: attach failed - Authentication error
2012-11-18 10:13:30 +0000 Unable to mount the archive (error = 1)
2012-11-18 10:13:30 +0000 Removed file at path /var/run/slapconfig.lock.
mail:~ svradmin$

Any suggestions appreciated