I'm getting the same error, does your 404 page show the file it can't locate? Mine can't find the FCKEditor.HTML file. I've been playing with the properties and none that seem to reference a path are solving the problem for me.
Set the basepath property to the folder that CONTAINS the editor folder. The path should be relative to the root of the website, such as "fckeditor/" without a leading /
Re: INSTALLATION FOR ASP.NET 2.0
Re: INSTALLATION FOR ASP.NET 2.0
Set the basepath property to the folder that CONTAINS the editor folder. The path should be relative to the root of the website, such as "fckeditor/" without a leading /