SUB37 & Minitaur editors problem

I have problem when I open both editor (SUB37 & Minitaur) in cubase5. (windows7) I have last midi drver but something went wrong. When open both editor only one work.. Second editor not reckognise hardver midi in/out. This hapend only in cubase.. When open standalone editors..both work perfect.
Eny sugestions?

Sorry for my bad english