help with mpk49 contoller and rewire needed

Hi folks,
I think im being a little thick here. im probably missing something really simple. im trying to use an akai mpk49 keyboard with cubase 5.5.3 rewired with reason. I can either have it controlling cubase or if i switch all the akais inputs offs in cubase then i can control reason.

my old controller controlled both dunno whats up have searched the web for hours with no light shed on this.

anyone had the same problem or am i missing some option like a midi thru or something ?

reason up to date
fireface uc
windows xp