Insert JavaScript If URL path contains word

so i changed the HTTP_REQUEST varible to 'uri' but im getting the same error. here is what the code looks like now;

when HTTP_REQUEST { 
     Disable the stream filter by default 
    STREAM::disable 
    if {[string tolower [HTTP::uri]] contains "anakin" }  {
        set uri [string tolower [HTTP::uri]]

}
}

when HTTP_RESPONSE { 
    if { [HTTP::status] == 200 } {
        if {[HTTP::header value Content-Type] contains "text"} { 
            set stream_find ""
            set stream_find_lower ""
            set stream_repl ""
            set insertJscript 1

             Do not allow the Javascript insertion if the pages end with the following
            switch -glob $uri { 
                "*.ashx*" - 
                "*.asmx*" - 
                "*.axd*" - 
                "*.js*" { 
                    set insertJscript 0 
                }
                default {
                    if { [HTTP::payload] contains "META HTTP-EQUIV=\"Refresh\""} { 
                        set insertJscript 0 
                    }
                }
            }

            if {$insertJscript == 1} { 
                append stream_repl $static::jscript
                append stream_expression "@$stream_find@$stream_repl$stream_find@" 
                append stream_expression "@$stream_find_lower@$stream_repl$stream_find_lower@" 

                STREAM::expression $stream_expression 
                STREAM::enable 
            }
        }
    }

}