Primavera Risk Analysis, Build impacted plans

Hello Planners,

I am trying to build risk impacted plans (both pre- and post-mitigation); everything works fine, except that I cannot have the risk summary tasks to include the risk impact tasks together with the base task

for example: the base task is 10 day long and the risk impact task is 2 day long; in the post-mitigation plan, the risk summary task is only 10 day long and the risk impact task is scheduled after the end of the summary task

Both the base task and the risk summary task end on may 14; the risk impact task starts on may 15 and ends on may 14! does the error come from this point?

in the PRA tutorial, the picture page 46 shows both the base and the risk impact tasks within the risk summary task's duration

Thank you for helping,

Alexandre