UP Core + High speed + Low Speed carrier board

Hi,
I'm in weird situation. I want to connect both carrier boards to UP Core but it does not work. Simply - my UP Core does not recognize second connected carrier board.
If I connect both carrier boards then only one is recognized in BIOS. It does not matter in which order I connect them. When I connect only one of carrier boards, then both of them works correctly so the carrier boards may not be faulty.
Does anyone have any idea what might be the problem?
Comments
Thanks for reporting. We just duplicated this problem and will come back with solution soon. @DCleri
Hi, what is the status of the solution?
For anyone reading this thread -- You need to change the jumpers on the second board as defined here.