Are you looking for records for the surname Dasburg or for the place called Dasburg?

Wikipedia has the following:

Dasburg is a municipality in the district of Bitburg-Prüm, in Rhineland-Palatinate, western Germany. Before Napoleon it was a part of Luxembourg.

The LDS catalog doesn't how that they have anything for Dasburg for earlier or later dates. Wonder if they might be in another parish for the later records. I would try using the Meyers-Ort gazetteer to see where the church records might be.