Both have to run in the same mode, that is 32 or 64 bit. So since probably your cubase etc. run as 32bit apps, right-click the Reason application and open the information tab, then select the "run in 32-bit mode" checkbox.
Plugin latency issues? Phasing on parallel channels? Want to know the real latency of your audio interface? Try the VMG-01!
Professional Audio Engineer at Theater Bremen, Germany • Part Time Programmer