The game was most likely updated and your files might have gotten corrupted.

Please try the following steps:

1. Go to: Settings -> Applications -> Aeons Echo -> select Force Close

2. Go to: Settings -> Applications ->  Aeons Echo -> select Clear Data

3. Uninstall the  Aeons Echo app

4. Reboot your phone

5. As soon as your phone starts, direct your browser to Nutaku to download the Nutaku Android Client for automatic game updates.