Wont let me enjoy the 7-day trial...

I dont know what the problem is but I cant get the 7-day trial because theres a problem, either from the App Store of from the app itself, but its disappointing because when youre not VIP you dont get to sing all the songs you want... I really wanted to try this app...

MileyTheWolf about Smule: Sing Songs & Make Music, v4.9.9