irule to load custom page via ifile when HTTP::status !200

root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.20.111:80
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        http { }
        tcp { }
    }
    rules {
        myrule
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    vlans-disabled
}
root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm pool foo
ltm pool foo {
    members {
        200.200.200.101:80 {
            address 200.200.200.101
        }
    }
}
root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm rule myrule
ltm rule myrule {
    when HTTP_RESPONSE {
  if { [HTTP::status] != 200 } {
    HTTP::respond 200 content [ifile get simpletext_ifile] noserver
  }
}
}

[root@ve11a:Active:Changes Pending] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.19.251(50701) <-> 172.28.20.111(80)
1374884126.3182 (0.0021)  C>S
---------------------------------------------------------------
GET /fake 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: 172.28.20.111
Accept: */*

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

New TCP connection 2: 200.200.200.14(50701) <-> 200.200.200.101(80)
1374884126.3201 (0.0018)  C>S
---------------------------------------------------------------
GET /fake 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: 172.28.20.111
Accept: */*

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

1374884126.3231 (0.0030)  S>C
---------------------------------------------------------------
HTTP/1.1 404 Not Found
Date: Sat, 27 Jul 2013 00:12:18 GMT
Server: Apache/2.2.3 (CentOS)
Content-Length: 280
Content-Type: text/html; charset=iso-8859-1



404 Not Found

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

Apache/2.2.3 (CentOS) Server at 172.28.20.111 Port 80

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

1374884126.3232 (0.0050)  S>C
---------------------------------------------------------------
HTTP/1.0 200 OK
Connection: Keep-Alive
Content-Length: 25

this is new simple text.
---------------------------------------------------------------