I have a similar problem when I, for example turn on the Bad Word Filter in the hidden administration section on Rakkoon.com. The words aren't filtered in comments made through the site. To get that working I use a seperate ASP file with only this in it:
<%
Application.Contents.RemoveAll
Response.Write "<p align=""center""><h2>Application Contents Removed</h2><br>" & vbNewline & _
"Please wait...</p>" & vbNewline & _
"<meta http-equiv=""Refresh"" content=""5; URL=default.asp"">" & vbNewline
%>
Of course you don't need the message nor the redirect, but I added it so I don't have to click the "back" button to return to the homepage 
Maybe this helps you too?