You need to refresh the application variables, copy the code below into a new asp file called run_config.asp, and save it to your forum directory, load the file into your browser and it should sort things out.
<%
response.buffer = TRUE
response.expires = -1
response.cachecontrol = "private"
response.addheader "pragma","no-cache"
response.addheader "cache-control","no-store"
strCookieURL = Left(Request.ServerVariables("Path_Info"), InstrRev(Request.ServerVariables("Path_Info"), "/"))
Application.Contents.RemoveAll ()
Application.Lock
Application(strCookieURL & "ConfigLoaded")= ""
Application.UnLock
%>
<!--#INCLUDE FILE="config.asp" -->