Could you please try to fix the problem by executing the onParentNodeChanged()
client-side method of the RadEditor object after it is shown?
A very similar problem is discussed in the following PITS item: http://www.telerik.com/support/pits.aspx#/public/aspnet-ajax/4889
FIX RadEditor is unusable when inside a control containter of RadWindow
If you use RadWindow to display a RadEditor instance the buttons in RadEditor do not work (rendering it unusable). The issue only arises when RadWindow is used as a control containter (i.e. the RadEditor is within the <ContentTemplate> of RadWindow).
To fix the problem you must execute the onParentNodeChanged() method of the RadEditor object after it is shown.
Here is the sample project: http://www.telerik.com/ClientsFiles/291003_UnusableEditorFIX.zip
My suggestion is to fire the onParentNodeChanged
() method when loading the dialog.
If you still experience the problem, please, isolate it in a simple working project, open a support ticket and send it for examination.
All the best,
the Telerik team