HTTPSConnectionPool

I'm trying to use the Data Loader for Google Maps Engine and I think there is a proxy issue. The connection to google worked from home but not from my office. The log shows this:

 

Google Maps Engine Raster Reader: Requesting access token from OAuth2 endpoint

 

 

Google Maps Engine Raster Reader: : Could not connect to server. Check that you are connected to the internet and that no firewall is blocking outbound connections. The error was 'HTTPSConnectionPool(host='accounts.google.com', port=443): Max retries exceeded with url: /o/oauth2/token (Caused by <class 'socket.error'>: [Errno 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond)'

 

 

A fatal error has occurred. Check the logfile above for details

 

 

and I get this dialog:

 

 

 

 

Does anyone have any suggestion?