add event from external source

i’have another problem…
I have a scheduler with map view… When add event from the scheduler everything is ok, move event,drag n drop, edit, map view… everything works!
the problem is when i add event from external resource, like xml load or direct sql query. The insert is ok, i see correctly the new event, but if i try to move this with the drag n drop this remains attached at pointer… until release it at start date. In firebug console i have this error, i know that is linked to map…

how i fix this?

Try to update scheduler to 3.0 version, it has map-view related fixes.