I have already answered your other support ticket. For your convenience, here is my answer:
RadEditor in WebPart:
Set (add if not present) the AllowScripts property to true in ConfigFile.xml
RadEditor in WCM:
Set (add if not present) the AllowScripts property to true in ConfigFile.xml and AllowSpecialTags in the current page using SharePoint Designer. Click here for more information.
SharePoint forms scenario (Lists, Wikis, Blogs, etc.)
I hope this helps.
the Telerik team