feed disappeared after a few days

i installed this plugin and it worked great, just what i was looking for. it updated with new tweets just fine for about two days, now i’ve checked on it an there are no tweets at all. the header for the widget is showing up, but no tweets below. i deactivated the plugin and re-activated but still no tweets. is there something conflicting with their display?
http://www.fangirlmag.com (side bar, below the tags)

http://wordpress.org/extend/plugins/mytwitterfeed/