I want to use a DAW with a Luna + ADAT-Extension, a scope professional and a syncplate, setted up with a 1 GHz Intel and Windows XP, sequenzer is Cubase 5.1

My problem: Now I want to connect 3 Behringer Ultragain Pro-8 via ADAT (24 Ch), but they doesn't sync without sparkles and glitches. One Ultragain is ok, but more than one doesn't work.
Now I am thinking about using the DAW via the syncplate as external wordclock-generator for the 3 Ultragains, but the Ultragain doesn't sync to the BNC-input.
Must I install the syncplate source or dest and wireing them with anything? Which BNC-connector is the right one? Is it possible to use the creamwarecard as wordclock for the ultragains?
Does anybody use a similar setup?
Thanks for help
Christian