So this is pretty strange. I tested your ID on my site and I got the same thing. I’ll bet if you stick my ID in (11469962) it will work fine for you. Then I went to look at the two RSS files and they look the same:
https://twitter.com/statuses/user_timeline/16251797.rss
https://twitter.com/statuses/user_timeline/11469962.rss
But, when I tried to add your RSS feed in Google Reader I get an error that the fed could not be found. Did some research on this error and someone suggested using https:// in Google Reader and that worked. So I tried switching the protocol in the plugin and that worked on my site. Can you try going into the plugin, “reliable-twitter.js”, line 16 and change https://twitter.com/statuses to https://twitter.com/statuses
See if that does the trick. I think it will. If it does, I’ll release a patch to the plugin.