hi, all-
in my portal, I'm ready to use web part, and in eath web part, using its UserControl, and in UC, I use Chartfx component, but the problem is when I click the button of the chartfx toolbar, one message appeared, the detail:
An error has occurred.
The target 'WebPartManager 1$wp53777766992$wp2061095920$chart1' for the callback could not be found or didn't implement ICallbackEventHander.
So, can you help me to solve this? or do you have good suggestion for that?