Huygens TV

I'm probably being dumb here, but I can't seem to get the ESA TV on my
satellite system. As will become clear, satellite TV is not my specialist
subject. Using the Sky menus, I've got it tuned on

Freq: 12.551 Ghz (not 12551.5 MHz since I cant choose fractions of a GHz)
Symbol rate 22 MHz
FEC 5/6

I don't see any option to change the transponder.

When I select 'find channel' I just get 'No Channel Found'

What did I miss?