hi
try that:
on Solar System MAp.8th from LEFT,icon are SHIPS,individual ships detail WINDOWS opened..on top RIGHT are a "MOTHERSHIPS ASSIGNED,check that if u FIND ur PDC's name..then ASSIGN'IT.
then on TASK GROUP windows are "retrieve Parassite" buttn on bottom..try that...next click "SET" button on top left and SHOW if ur Scout r joined on Task group:)
hope r right procedure.
See ya