HTC One M8 Mobile Hotspot

I switched from an iPhone 5 to an HTC One M8 yesterday... Everything is working great.  However, I cannot get the mobile hotspot to turn on/activate.  When I try to turn it on it switches off and a text box pops up telling me I have to call 611 or activate it in my account.  I have the mobile share 10 gig plan, and the mobile hotspot on my iPhone worked fine the day before this.  Am I missing something to get it to work on the HTC?  I did look on my plan and its still included.  Any ideas?  ~Mike