If you are experiencing a crash immediately after launching the game, the problem may be due to a small data file on your device having become corrupted.

Using a file manager, locate the folder on your device under sdcard0/Android/data/com.glu.android.gwallet


Delete this folder:

com.glu.android.gwallet

to force the game to re-create the folder next time it is launched.  This re-establishes contact with the server and should resolve your problem.