Basecamp does not show Garmin Topo Finland V5 pro map on gps 66S

I bought Garmin Topo Finland V5 map for my GPS 66S. it is instilled on micro sd card in GPS device. I want to use Basecamp program to plan routes. Problem is that Basecamp does not show the Topo map! Basecamp shows only the general map from 66s. What is wrong??? Basecamp version is 4.8.11