When you attempt a drag and drop operation, (regardless of whether you are using Microsoft IE or Firefox) the confirmation form may report that your requested operation can't be performed because rules forbid it. this is because there are rules that Presto system administrators can set up to control the types of possible connections between Explore tab items.

Simply put, if you can't create a page of a particular type underneath an existing page, then you can't drag something of that type underneath the existing page either.  If you are not sure if a particular drag and drop operation is possible, just try it.  Alternately, select the target page in the Explorer tab, click on Page Tools, Create, and examine the list of creatable items.  If the items you were going to drag were of that type, then the operation will not be blocked.

Rules can be general, for example, enabling all sections to have sub-pages of type "page"; alternately they can be specific to a particular page, e.g. that a page can have calendars under it, and nothing else.

Contact your Presto support representative for more information on rule restrictions that may be in place, or desired modifications thereof.

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