If you are unable to sign in to Rediff Bol, try the following solutions: check if your Internet connection is on or if it is behind any Proxy connection set up. Try reconfiguring your Proxy in a few simple steps: click Settings, Connection Settings, Set HTTP proxy. Enter the user name and password if required. Make sure that Rediff Bol isn't being blocked by your Firewall. In order to do this, go to Start, Control Panel, Windows Firewall and add Rediff Bol to the exceptions list.
Ultimately, you can try resetting Internet Explorer's configuration. Go to http://internet-explorer.software.informer.com/ and download and install the latest version of Internet Explorer. Restart your system, open Internet Explorer, go to Tools, Internet Options, Advanced and hit Reset, Apply and OK.