Thanks for the replies.
I booked the ticket direct with KE, not via an agent.
The issue appears to be as follows.
Although I am in Skypass I wanted FB miles on this occasion. The KE person with whom I booked the ticket did warn me that I probably would not be able to find my flight on the website, because without a Skypass number allocated to it, and an FB number allocated, there appears to be some problem. I am just repeating what I was told.
Although it is with a Skyteam partner, I cannot access the flight details via KLM/FB, as KE have not given me an alhpanumeric code of the sort the KLM/FB system expects. This also applies to CheckMyTrip.
I shall try logging in to Skypass and using the KE booking reference. Succes or failure will be reported shortly
OK - failure. The KE person was correct.
'You may conveniently retrieve and print your Korean Air International e-ticket Itinerary & Receipt. To use this service, your SKYPASS number must be entered in the e-ticket. There are no international e-ticket records under your SKYPASS number.'
I tried this after trying to access the flight details via the automatic finder on the site.
Not to worry. I found the KE people to be very helpful, and they were truthful and accurate about accessing the flight online.
Thanks again for the comments.