Cubase LE5 with Jack Router


So, I’m trying to record directly from a software synth into Cubase LE 5 on Windows XP (uh huh) using Jack Router.

As far as I can figure out, I’ve made all the appropriate driver selections in both programs, the proper io connections in JACK, sample rates match, audio settings seem fine at least to me, etc. etc. Yet I cannot seem to get Cubase to play the sequence I’ve been working on, or record anything new via Jack Router. I don’t know what’s wrong, but surely I’m not the first to do this. Everything works fine under ASIO4ALL, but Jack Router would really help my workflow if only I could get it working. Does anybody have any advice?

Thanks so much.