Now, I have to ask - Are you sure you have the right credentials?
I know WWF is a bit buggy on Android. I have to install the app, run it and enter my credentials and save. Then exit the app (hit the home button), then open the app again and it will sync with my account. But, it takes a while. I found exiting again and opening again usually yields the best results.
I recently bought acer iconica and I found it kind of cool actually as I haven't used any tablet before. I like its touch, smart user controls, it have long battery life, I love its design, actually I love its most of the features.