http://iscoresports.com/

On my game screen some games have the iscore cast radio symbol and some dont? is there something i need to do to add iscorecast to the game?

If you scored games without having iScorecast enabled (or did not have an internet connection while scoring), you can still add them to the iScorecast server. Go to Game Manager in iScore, select the game, then scroll down to "i-ScoreCast Synchronize" and tap that to send the game up to the iScorecast server.