Do the following in this order.
1. go to http://www.adobe.com/software/flash/about/ and make sure to have flash player version 10,1,82,76 installed (Latest version is 10,1,82,76 and works fine on flirt4free).
2. if you don't see the version saying it's 10,1,82,76 go to http://kb2.adobe.com/cps/141/tn_14157.html and use the uninstaller there. The go to http://get.adobe.com/flashplayer/ to reinstall flash and then go back to step 1 to confirm it has installed 10,1,82,76.
3. Go into firefox/crome/I.E and click tools and clear recent history and select everything (cookies and temps). clear everything close firefox/crome/I.E and reopen it and try to login to flirt4free and see if it is working now. If not go to step 4.
4. If still having problems and the correct version of flash player is installed go to http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html
and click delete all sites and restart firefox/crome/I.E and try to login agian into flirt4free. It should work now if not shout again.
If still not working tell me windows version and firefox/crome/I.E version you are using also make sure to update firefox/crome/I.E to latest version.
Also to confirm you are seeing the latest version of the site right click the chat box or video in a room and it should say VS Client v3.2.88 this is the latest version and what they are using today, if it says any other version under that version number means you need to make sure to clear out your internet temp files and cookies in the browser.