03-22-2010 11:55 PM
I am not familiar with "Tumblr" as such but am assuming you either are attempting to access your account by using your browser or more likely given the board you posted in via a downloaded application.
Without knowing more details it is impossible to assist you. I am assuming that you are attempting to access via your unspecified Blackberry in any case.
Are you absolutely sure of your access credentials? If, however, you are accessing via the web is their site configured for access via Blackberry?
Too many unkown variables.
11-02-2012 10:27 PM
It looks like the folks at Tumblr took the app down. Maybe they're working on an update? You should send them a tweet - @tumblr