replace quotes with UTF-8 character

I have an ASP page that updates information into my SQL 2008R2 database.
The use of quotes and other characters is causing issues so I have a function that replaces then with their Unicode character, below is the function:

function clean( str )
    if str <> "" and not isNull( str ) then
        str = Replace( str, "<", "" )
        str = Replace( str, ">", "" )
        str = Replace( str, "&", "&amp;" )
		str = Replace( str, "'", "&apos;" )
        str = Replace( str, "&quot;", "\""" ) 
		str = Replace( str, "&amp;apos;", "'" )
		str = Replace( str, chr(226) & chr(128) & chr(156), "" )    'replaces left smart quote
		str = Replace( str, chr(226) & chr(128) & chr(157), "" )    'replaces right smart quote
		str = Replace( str, chr(226) & chr(128) & chr(153), "" )    'replaces left smart apostrophe
		str = Replace( str, chr(226) & chr(128) & chr(152), "" )    'replaces right smart apostrophe
    end if                
    clean = str
end function

I am trying to apply this into the ASP code but I am doing something wrong that is not working. Here is what I have. I could use some help.
* This is just part of the code, but the part I think is relevant to the issue.

 Set MM_editCmd = Server.CreateObject ("ADODB.Command")
    MM_editCmd.ActiveConnection = MM_bluedot_STRING
    MM_editCmd.CommandText = "UPDATE dbo.AdminChecklist SET Docname = ?, Docfrom = ? WHERE docid = ?" 
    MM_editCmd.Prepared = true
    MM_editCmd.Parameters.Append MM_editCmd.CreateParameter("param1", 202, 1, 100, (Request.Form(clean("Docname")))) ' adVarWChar
    MM_editCmd.Parameters.Append MM_editCmd.CreateParameter("param2", 202, 1, 150, Request.Form("Docfrom")) ' adVarWChar
    MM_editCmd.Parameters.Append MM_editCmd.CreateParameter("param3", 5, 1, -1, MM_IIF(Request.Form("MM_recordId"), Request.Form("MM_recordId"), null)) ' adDouble
    MM_editCmd.Execute