http::status 404 will NOT process http::respond 200

[root@iris:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.17.33:http
   ip protocol tcp
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@iris:Active] config  b pool foo list
pool foo {
   members 10.10.70.110:http {}
}
[root@iris:Active] config  b rule myrule list
rule myrule {
   when HTTP_RESPONSE {
        if { [HTTP::status] == 404 } {
                HTTP::respond 200 content "maintenance pageSite is Currently Unavailable"
        }
}
}

 curl -i http://172.28.17.33/notreal
HTTP/1.0 200 OK
Server: BigIP
Connection: Keep-Alive
Content-Length: 84

maintenance pageSite is Currently Unavailable

[root@iris:Active] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.17.20(38858) <-> 172.28.17.33(80)
1320255154.0773 (0.0011)  C>S
---------------------------------------------------------------
GET /notreal HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.17.33
Accept: */*

---------------------------------------------------------------

New TCP connection 2: 10.10.72.30(38858) <-> 10.10.70.110(80)
1320255154.0776 (0.0003)  C>S
---------------------------------------------------------------
GET /notreal HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.17.33
Accept: */*

---------------------------------------------------------------

1320255154.0795 (0.0018)  S>C
---------------------------------------------------------------
HTTP/1.1 404 Not Found
Date: Wed, 02 Nov 2011 08:42:45 GMT
Server: Apache/2.0.59 (rPath)
Vary: Accept-Encoding
Content-Length: 282
Content-Type: text/html; charset=iso-8859-1



404 Not Found

Not Found
The requested URL /notreal was not found on this server.

Apache/2.0.59 (rPath) Server at 172.28.17.33 Port 80

---------------------------------------------------------------

1320255154.0796 (0.0023)  S>C
---------------------------------------------------------------
HTTP/1.0 200 OK
Server: BigIP
Connection: Keep-Alive
Content-Length: 84

maintenance pageSite is Currently Unavailable
---------------------------------------------------------------