abort: HTTP Error 502

When I push to g11n, whether use http or https, both got the same error:

C:\var\vcs\hg\g11n>hg -v push
pushing to https://dongsheng@bitbucket.org/dongsheng/g11n\\
searching for changes
17 changesets found
http authorization required
realm: Bitbucket.org HTTP
user: dongsheng
password:
abort: HTTP Error 502: Proxy Error

But push to hg-bfiles no errors.