The KPI when drilled-down provide results, but the graphs linked to them do not. Why?

The KPI when drilled-down provide results, but the graphs linked to them do not. Why?

A graph linked to a KPI is pinned in ARC 6.0 by default. In such cases, you have to modify the '?Default Pin Graph' option in Visual Personalization to '?Do not pin graph?'. Pin Graph utility allows you to freeze a graph at its current value for the future use. So the graph view remains the same though the KPI is re-executed with different filters.