http://iscoresports.com/

I have a iPOD---Before the game starter form teams and then went to sync both teams and when I went to the visitor side is said that I needed MLB2011 which does not exist on the itunes site. I have added a download the 2011 Major League Daily Rosters, lineups and Stats. Also purchased IScore Baseball Major League Rosters 2010. Do I need both or just one of these and is this causing the problem. The error message I'm getting is Error Reading Lineup---you must upgrade to MLB2011 rosters to use Sync functinality.

go to options > add ons and update/get data is how you "sync"

That error will happen if you accidentally create the teams using your MLB 2010 rosters. Go to League Manager on your device, and turn off the MLB 2010 leagues to make sure you are not accidentally selecting the teams from the 2010 season. Then create a new game, and you will select teams from the 2011 season. Sync will then work as expected.