Does testnet even work for this build? I'm not having any luck with mining in testnet or even -gen=1 working.
Are you talking about the beta test for staking? If so, then you need to sign up on the DMDcoin.net forum (see a few posts above by Vagnavs).
The current wallet (2.0.1) does not stake no mater what settings you give it.
The beta test requires a whole new wallet and (forked) blockchain download.
If you're trying to solo-mine.....then that's a different subject.