prova così
codice:
 
if  (false Or CStr(Session("MM_UserAuthorization"))="") Or _
	InStr(1,MM_authorizedUsers,"," & Session("MM_UserAuthorization") & ",") <> 0 or _
	InStr(1,MM_authorizedUsers,Session("MM_UserAuthorization") & ",") = 2 or _
	InStrRev(MM_authorizedUsers,"," & Session("MM_UserAuthorization")) = len(MM_authorizedUsers) - len(Session("MM_UserAuthorization")) then

al posto di
codice:
If (false Or CStr(Session("MM_UserAuthorization"))="") Or _
         (InStr(1,MM_authorizedUsers,Session("MM_UserAuthorization"))>=1) Then