Cameo to Doors Next Generation: Parent Child relationship

Hi Everyone,
I am starting to use DataHub to take requirements from CAMEO Systems modeller 19 into Doors Next Generation (web version) but have come across a rather fundamental issue. I'm not sure what I am doing wrong
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I have a number of requirements within CAMEO that have a nested structure through the use of the 'containment' connector in CAMEO. My understanding was that the containment represented the parent child relationship. When I try and bring them into doors this parent child link is not recognised. If I use the other types of connector like derive or trace they are brought across. Any ideas on what I am doing wrong?
Kind Regards,
I am starting to use DataHub to take requirements from CAMEO Systems modeller 19 into Doors Next Generation (web version) but have come across a rather fundamental issue. I'm not sure what I am doing wrong

I have a number of requirements within CAMEO that have a nested structure through the use of the 'containment' connector in CAMEO. My understanding was that the containment represented the parent child relationship. When I try and bring them into doors this parent child link is not recognised. If I use the other types of connector like derive or trace they are brought across. Any ideas on what I am doing wrong?
Kind Regards,