[Rwp] Struggling using Osara

[Yukio Nozawa]

Hi.
I've been using ReaAccess for a very long time, but finally decided to switc
h to Osara. As the title says, I'm struggling starting Reaping with Osara no
w. Can anyone help me with it?
I did following.
1 Uninstall ReaAccess
2 Get the latest Osara build and keymap from GitHub.
3 Copy the DLL into reaper/plugins folder.
4 Osara itself seems to be running fine. NVDA is reading something.
5 Open the action list and import the key map.

However, I can do nothing with it. First of all, up and down arrows for trac
k selection don't work, and all of the functions that were usable with ReaAc
cess are inaccessible.
Sorry for my stupid question, but I'm very confusing. How do I get started w
ith Osara?