I have been unable to have different FFP account numbers pre-registered for the three sectors on IB that I am going to fly over this weekend.

They are part of my RTW trip on oneworld Explorer and all of the three are in a series -- the first (MAD-ALC) on Nov. 20 and the second (ALC-BCN) and third (BCN-LHR) on Nov. 21.

IB has kindly declined to pre-register them at all, saying, ''It is too complicated,'' and asked me to contact AA, which made all the reservations for me.

AA (in TYO) gave it a try but turned out that the first FFP that was registered prevails over the remaining two sectors as well -- meaning that I can only have one FFP number registered for all the three.

I have thus decided to go unregistered and ''negotiate'' to have three different FFP account numbers registered at check-in counters, or perhaps I should have all unregistered and send boarding passes and ticket copies to each FFP operator.

Has anyone encountered a similar problem?

Or has anyone succeeded ever in getting different FFP numbers registered for IB flights, either on CRS for reservations or at check-in counters?

BTW, I had no problem at all whatsoever in having different FFP numbers pre-registered for the BA, AA, CX and CP sectors on my RTW itinerary.

I would appreciate any comments, insights or suggestions on this matter.