Simcash not sending any SMS ?

Started using simcash but in 24h the app only sent 1 message, is that normal?

Also, sometimes it shows that I've failed several times to send a message (I've listed all the countries and my provider allows me to send SMS to other countries), any of you ever had this problem?

I was thinking that maybe some countries are bugged in the app, what countries are you guys sending to?