Did you register your number with your real IMEI using the Java port or you used a fake IMEI? To get your IMEI dial *#06# If you forget the IMEI you used for the Java port, type this in your device as user (not root): Code: grep IMEI ~/.java/.userPrefs/org/peterbjornx/whatsapp/storage/prefs.xml are they the same number?
grep IMEI ~/.java/.userPrefs/org/peterbjornx/whatsapp/storage/prefs.xml