Hey my problem is:
When i'm login on multiplayer server,my country flag is a toribash logo,How can i fix this,it's really annoying.

You need to use a more recent version of TB. With some of the older versions, flags don't get displayed properly.

You could use an anonymous proxy.

I play with the lastest version,Still same...

And History how can i use an anonymous proxy?

http://hidemyass.com/proxy-list/

choose one.
Chrome : Settings - Show Advanced Settings - Change Proxy Settings - Connections - LAN Setting - Use a proxy server - advanced - enter the number