Instruments not showing up in search

I have REAPER and t I exported midi tracks from REAPER to Cubase 7 and when I tried to assign the same instruments from Halion Sonic 2 that I had in the REAPER project the entire instrument list from Sonic 2 is just gone. The instruments I used in the REAPER project and past Cubase projects show up in Sonic when I load the projects but they are simply gone when I load Sonic from Cubase in a new project and they’re gone when I load Halion Sonic by itself (like one would if you were using it to just play instruments.)

What is going on and how do I fix this it is extremely frustrating