Can not rake success

Here is the message:

-- MacVim ---------------------------------------------------------------------- brew cask install macvim ==> Caveats Cask macvim installs files under "/usr/local". The presence of such files can cause warnings when running "brew doctor", which is considered to be a bug in homebrew-cask.

Note that homebrew also provides a compiled macvim Formula that links its binary to /usr/local/bin/mvim. It's not recommended to install both the Cask and the Formula of MacVim.

==> Downloading https://github.com/b4winckler/macvim/releases/download/snapshot-

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curl: (7) Failed to connect to s3.amazonaws.com port 443: Operation timed out Error: Download failed on Cask 'macvim' with message: Download failed: https://github.com/b4winckler/macvim/releases/download/snapshot-73/MacVim-snapshot-73-Mavericks.tbz rake aborted! Command failed with status (1): [brew cask install macvim ...] /Users/huaxu/Documents/maximum-awesome/Rakefile:35:in brew_cask_install' /Users/huaxu/Documents/maximum-awesome/Rakefile:175:inblock (2 levels) in <top (required)>' /Users/huaxu/Documents/maximum-awesome/Rakefile:236:in `block in <top (required)>' Tasks: TOP => install:macvim

I have installed maxim before and I uninstall it a month ago. Anybody please give me some advise.