I am facing difficulties in accessing opera. and no page is opening since last night. and gives this error.
"
Unable to connect to the proxy server

A proxy server is a server that acts as an intermediary between your computer and other servers. Right now, your system is configured to use a proxy, but Opera can't connect to it.
If you use a proxy server...

Check your proxy settings or contact your network administrator to make sure the proxy server is working. If you don't believe you should be using a proxy server: Go to the Opera menu > Settings > Change proxy settings... > LAN Settings and deselect "Use a proxy server for your LAN".
"
so how can I solve it.