Are you sure? Please make sure that you have configure it correctly.
This plugin has been tested on WP 3.2 for sure and it does work.
There could also be some other cause such as Twitter API issue, server’s issue, and other else.
So, don’t jump into the conclusion that this plugin doesn’t work so easily.
You may try to debug it first, drag the widget to a sidebar and view your website but with a query string “?xmt_debug_show” after your URL.
Ex: https://example.com/?xmt_debug_show