Restrict directory by IP

This first irule IP restriction works for "discard" but the second one does not do the redirect. Any help is appreciated.

when HTTP_REQUEST { if { [string tolower [HTTP::uri]] starts_with "/hello" and ![IP::addr [IP::client_addr] equals 152.140.0.0/16] } { discard } }

This does not work it gets a 404

when HTTP_REQUEST { if { [string tolower [HTTP::uri]] starts_with "/hello" and ![IP::addr [IP::client_addr] equals 152.140.0.0/16] } { HTTP::redirect "; } }