Hello,
In order to scan these channels, you must scan channels 0 through 5 and discard the other channels data (ie. ob0!sc1!md1!0:5)
Otherwise, you could create Virtual channels and then just list the names of the two channels or you could move to using DAQmx.
Please see this KB for more information:
http://digital.ni.com/public.nsf/websearch/02a55e1f39e8bd15862567e700577877?OpenDocument
Regards,
Bill B
Applications Engineer
National Instruments