To assign value to Double select

HI, I give next background: 01 table “Country” (id_country, name), 01 table “Travel”(id_travel, run, id_country, obs)
I do a Form where the field id_country of table Travel is Double Select with lookup to table Country, then I do a grid but when I want show the name of country it doesn’t.

I think that I shall separate in array?

Help me please.

Thanks