Pidgin not working with Twitter

[mounty1]

Create the Twitter account, click on enable accounts and a dialog pops up saying Please copy the PIN number [sic] from the web page so I go to the web page and copy the seven digit number from there into the dialog box. Then go to the Modify Account dialog and enter my Twitter password (not the seven digit number) and save. After a few moments the Buddy List shows Authentication error. What's going on ?

I added sasl to the global USE flags, rebuilt @world (which rebuilt pidgin but not mbpurple) and restarted pidgin, but no change.
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Michael Mounteney