403 Forbidden Error from Amazon S3

Another programmer has been working on my project on a new branch. To view his work, I fetched the branch and updated the bundle with bundle install. When I try to rake db:migrate I get a 403 Forbidden error with no 开发者_开发知识库other explanation. I believe it is complaining about the Amazon S3 credentials for paperclip but can't seem to fix the issue. Any ideas? Thanks.