Icons Greyed out - Why and how do I move on

[walthoh]

Hi I think duo lingo is great. I'm only on level 5 but i'm having difficulty moving on as the icons are greyed out even though I've perfercted the others. Any one any ideas how I move on?

gracias

Helen

[psionpete]

You unlock skills and lessons by completing all the lessons/skills preceding the first greyed out lesson/skill.