Yes, that's right, they won in Germany. Bohs beat Kaiserslautern 1-0 back in 2000 in a UEFA Cup clash.
[youtube http://www.youtube.com/watch?v=9d9K28gfUF0&w=480&h=360]
The Gypsies eventually lost the tie 3-2 on aggregate though after the Germans won the first leg 3-1 in Dublin.