custom page response

Hi,

I would custom the page response when Brute force attack is blocked. below the irule implemented:

when ASM_REQUEST_BLOCKING { set x [ASM::violation_data]

for {set i 0} { $i < 7 } {incr i} {

  switch $i {

  0         { log local0. "violation=[lindex $x $i]" }

  1         { log local0. "support_id=[lindex $x $i]" }

  2         { log local0. "web_application=[lindex $x $i]" }

  3         { log local0. "severity=[lindex $x $i]" }

  4         { log local0. "source_ip=[lindex $x $i]" }

  5         { log local0. "attack_type=[lindex $x $i]" }

  6         { log local0. "request_status=[lindex $x $i]" }
}} if {([lindex $x 0] contains "VIOLATION_BRUTE_FORCE")}{ log local0. "VIOLATION_BRUTE_FORCE_ATTACK_DETECTED, let's customized reject page"

  HTTP::header remove Content-Length
  HTTP::header insert header_1 value_1
  set response "We are sorry,\
but the site you are looking for is temporarily out of service\If you feel you have reached this page in error, please try again."

  ASM::payload replace 0 [ASM::payload length] ""

  ASM::payload replace 0 0 $response
}

}

but after join the irule to the VS, the irule not worked.

can you help me ?