Twitter Wordpress Plugin Problems

I am having trouble authenticating / logging in to twitter with these plugins running on wpmu.None of them can access twitter but I can log in directly into Twitter with all of my accounts. Has anyone else had this issue? Is it because they're installed on wpmu? The plugins and widgets seem to hook into wpmu, the widgets are displayed, but they can't seem to grab any data...

1. Twitter Tools
2. Twitter For Wordpress
3. Twitter Friends