Getting up and running with mail-merge, having a problem.

This job:
>//sample.mailmerge-1
>Distribute mail-merge dbms= list(dwhse4) pw=test
>//to DD " "
>//data dd *
>Date:    &*DATE;
>From:    [log in to unmask]]
>Subject:    Mail Merge Test
>Reply-To:    [log in to unmask]
>To:    &*TO;
>
>this email sent to: &*TO;
>
>this is simply a test

Yields this error message:
> Distribute mail-merge dbms=list(dwhse4)

Serious error occurred - traceback follows
------------------------------------------
>>> Error X'FFFFFFFF' parsing "DBMS=" list keyword <<<
-> Severity: Reserved (7)
-> Facility: Generic error codes
-> Abstract: Unspecified error (0)


Any ideas?

Thanks,
Christopher J Kosel
Digital River, Inc.