Default whatsapp crash on flexnote

Hai..im using gt n5100..after flashing a flexnote rom.. My whatsapp cant open..im trying to uninstall and install it..still not work..i also wipe data..wipe dalvik..trying to reinstall and uninstall the rom..but my whatsapp still the same..when open whatsapp It will show a dialog box an android.acore has been stop.. When click ok..it will stop the whatsapp.. Im still receiving whatsapp message..but..i just cant open it..pls help..coz its about aweek that i cant use my whatsapp..