Simple persistence problem

using performance HTTP profile.

 

 

when HTTP_REQUEST {
LB::detach
HTTP::header insert ORIG_CLIENT_IP [IP::remote_addr]
HTTP::header insert X_FWD_IP_ADDR [IP::remote_addr]
pool my-www
persist source_addr 255.255.255.0 3600
}

 

 

yet the requests goto every other server on every other request. am I missing somthing? sadly this isn't as simple as the old 4.x code.