It seems to be a bit hit and miss, but copy the empty file to your DSD+ folder and then tune CC DSD+ to P25 control channels. Exiting/restarting CC DSD+ might help wake it up.
Finally it looks like its fixed! I use SDR Sharp and have two separate folders SDR Sharp and 1 with DSD. I copy the file to the parent folder SDR Sharp and now it works)
I was copy everything good, i already runs DSD+ now for 4 months with out problems and just buy Fast Lane. But looks like a bug with parent/sub folders.