Fixed this one by searching through the forum. It's an odd fix - the #include statement for CuteEditor needs to be at the top of the file. I don't quite understand why since I wasn't making any calls to it until after the #include, but there you have it! Now, on to my new problem:

Microsoft VBScript runtime error '800a000d'

Type mismatch: 'Session'

/CuteEditor_Files/include_CuteEditor.asp, line 957

Do I need to have Sessions enabled for this website in order for CuteEditor to work? On another note: is the config file you are using for this editor available? Thanks!