Problem populating BerkeleyDB

[jeffnjnecom]

I am trying to switch to a BDB but I am not able to get the tables to populate. After I set the spamdb parameter to DB: and the DBdriver to BerkeleyDB, the Hmmdb.BDB and spamdb.BDB files are created but they don't seem to get any data. If I then run the RebuildSpamDB, I get permission denied message and the BDB files don't seem to change.

Below are the results of the rebuildspamdb which shows a "Permission denied" error.

**********Mar-03-13 14:50:19 RebuildSpamDB 2.98 (13040) is starting;

Running in ASSP.pi-usa.us basedirectory 'C:/assp'

<snip>
Generating weighted Bayesian tuplets...done

Saving rebuilt SPAM database...unable to rename 'C:/ASSP/DB:.tmp' to 'C:/ASSP/DB:' Permission denied
done

Resulting file 'DB:' is bytes
Bayesian Pairs: 56,767

HELO Blacklist: 113 HELOs
unable to rename 'C:/ASSP/DB:.helo.tmp' to 'C:/ASSP/DB:.helo' Permission denied

My Version Info:
ASSP version 2.2.2(13055)
BerkeleyDB 0.51
BerkeleyDB_DBEngine 5.3

I have to be missing something pretty basic but I can't seem to see it. My feeling is that it is trying to work with a literal file name "DB:.tmp" which is not a valid file name on my Win32 computer. The web GUI mentions the DB_CONFIG file but it seems to be optional so I do not have one. Could this be my problem? Where do I need to look?

TIA

-jeff