Why don't my hash tags work on instagram?

[Olivia]

Okay, I have Instagram on my ipad (I don't know if that would effect it but I thought I'd say it anyway) and every time I try and hashtag I always get this little red exclamation mark and it won't let me send the hashtag it just tells me to retry. Is there any way I can get rid of this and allow my hashtag s to work again. By the way, my account is not set on private and I haven't changed any settings, however I have changed my name and updated my bio..

[Mark Polo Nguyen]

because they don't want it to be exactly like Twitter. Facebook doesn't have hashtag either.