iRule for selecting a pool based on a cookie value not working

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   destination 172.28.19.252:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
  set uri [HTTP::uri]
  set cookie [HTTP::cookie value "asv"]
  if { $cookie eq "1" } {
    pool new_foo
  } else {
    pool foo
  }
}
when HTTP_RESPONSE {
  log local0. "client [IP::client_addr]:[TCP::client_port] | uri $uri | cookie $cookie | pool [LB::server pool] | server [IP::remote_addr]:[TCP::remote_port]"
}
}
[root@ve10:Active] config  b pool foo list
pool foo {
   min active members 1
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b pool new_foo list
pool new_foo {
   members 200.200.200.111:80 {}
}

[root@ve10:Active] config  tail -f /var/log/ltm
Jan 18 04:11:56 local/tmm info tmm[4884]: Rule myrule : client 172.28.19.251:46804 | uri / | cookie 1 | pool new_foo | server 200.200.200.111:80
Jan 18 04:12:22 local/tmm info tmm[4884]: Rule myrule : client 172.28.19.251:46805 | uri /something | cookie 99 | pool foo | server 200.200.200.101:80