OnCallback does not fire second time

Hi
As you know i have a main form which shows frame's in a Region.
The first time i show a specific frame , the context menu on a grid shows and the InCallback fires if i select the menuitem.
Than i select a different frame to be shown. The frame with the ContextMenu is destroyed.
Than i select the same frame as the first time. The Contextmenu is shown but the callback does not fire anymore.
Any idea what's going on?
Eric
As you know i have a main form which shows frame's in a Region.
The first time i show a specific frame , the context menu on a grid shows and the InCallback fires if i select the menuitem.
Than i select a different frame to be shown. The frame with the ContextMenu is destroyed.
Than i select the same frame as the first time. The Contextmenu is shown but the callback does not fire anymore.
Any idea what's going on?
Eric