Having trouble while accessing MobileVoip on Apple X

MobileVoip Application is not running well on Apple x, since long time its not functioning properly.

again and again to re-login msg. is coming. even after login i can't dial a call from my phone book or from recent call list.

again shows login again...

Problems getting contacts with mobilevoip. Keeps crashing , any solutions?

Want to give minus (-4) Ratings to this App. Very bad, very horrifying...

Hitesh

Thank You.....