Problems with booking Comfort class to Seoul/ICN
I am trying to book AMS-IST-ICN for mid july with a return a month later and the timetable on the tk website shows that they fly the B777W with comfort class to ICN on wednesday and saturday but when i try to book it i get an error.Does anyone why this is , are they fully booked or is it just a glitch in the system or maybe they are not actually flying the B777?Any info would be welcome.