I downloaded today Rosergarden for Windows and I found two problems:
* I have JACK for Windows also installed (it comes with last version of Hydrogen). The Windows version of Rosegarden can't work with JACK. JACK doesn't see Rosegarden and viceversa.
* I tried many Virtual MIDI ports to connect other virtual MIDI devices. I can't add anu imput MIDI and When I want to do sometimes Rosegarden crashes. I tested it with midyoke, sony virtual midi router and loopbe1, to connect http://vmpk.sourceforge.net/