Some satellite boxes last a long time! There are still a few older satellite boxes in use today that run on legacy broadcast standards. 

Moving to the new satellite in April requires all channels to be transmitted using newer technical standards and methods (specifically DVB-S2 and MPEG4). 

Unfortunately, older satellite boxes are not compatible with these new standards and would lose access to all channels when we move to the new satellite. Freeview-approved satellite boxes sold since 2017 are expected to be compatible, as are Freeview-approved dual tuner TVs.

Sky Open, eden+1, Bravo+1 and Al Jazeera already broadcast using the new standards or methods. If you can't watch those channels, then your satellite box is one of those older boxes and it's time to upgrade. Upgrade your satellite box as early as possible and before April to keep watching free live TV and futureproof your setup.