PiMP cgminer groestl dmd r9-280x

[usao]

I am trying to get GPU mining to work using DMD coin.
Im using the PiMP mining software, and trying to figure out how to create a CONF file.
Not having any luck. Ive tweaked and fiddled for the past several days, but all I get is 100% reject rate.
I just don't know what im doing wrong, and im pretty frustrated right now.
Has anyone gotten a GPU to mine Groestl (DMD) on a R9-280x card?
If so, I would really appreciate some help.