what version of WD?
(make sure you have a recent version)
try revoking it from your twitter account (the app)
and delete the twitter.ini settings file from where WD is installed
then try doing a test send from WD and then re login/sign up
what version of WD?
(make sure you have a recent version)
try revoking it from your twitter account (the app)
and delete the twitter.ini settings file from where WD is installed
then try doing a test send from WD and then re login/sign up