Could not find oauth1-0.4.1 in any of the sources

I have developing my application w/ no开发者_开发百科 problems for a couple of months now. Today as I was trying to create a model using rails g model ... I get the following message in my terminal window:

Could not find oauth1-0.4.1 in any of the sources

How can I determine where this message is coming from so that I can continue my development. I don't recall adding any sort of gem that would require this.

https://img.skitch.com/20110525-93sat2axsrw9nneusew8e1kmu.png

try running sudo bundle install or paste the complete exception. It seems that rails is having problem in loading the environment.