Hi May Ann,
On the Android-powered Samsung Galaxy Note, I would suggest downloading the proper Skype app to do your video-calling. I use multiple Android devices, and Skype is the best app to use as it's pretty much universal - it's on Windows, Mac, iOS and Android.
Facebook partnered up with Skype for their video calling feature anyway, but Skype as a standalone app is much better, and easier.
And for you, someone who is having problems getting Facebook video calls to work, Skype is your perfect alternative. I personally use Skype on my Android device, to call my sister-in-law's iPhone, or my friends' Android-based phones.
Let me know how you go!