The 11741 transponder is no longer active, use the new one I gave you, I have a Pansat 2700 and 3500, this is how you edit a transponder if it is same for the 250.
Go into the menu
select "Install"
select "Edit TP/Satellite"
Select the correct satellite "SBS6"
select "Edit TP"
Select "New"
Enter the new information or you could select the old transponder and edit it.