property is not supported by RadEditor for ASP.NET AJAX (RadEditor for MOSS 5.x), because it has new toolbar architecture based on image sprites. Please, remove the iconurl
property from the respective ToolsFile.
Note that, the new RadEditor use a new client-side model, semantic rendering, and many other innovations such as the use of css image sprites, it delivers minimal and well-formed output. It’s new rendering and architecture allows it to be a couple of times faster than the classic ASP.NET Editor.
To set an image to a custom tool you should provide image files for it and declare the following CSS class:
You can find more information in the following KB article: Adding Your Own Buttons
All the best,
the Telerik team
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