CACHE::disable iRule doesn't seem to be working.

thanks for your information 

but below irule does not work,, f5 device can not send traffic to server after applied below irule

idk the reason

when HTTP_REQUEST priority 500 {

     if { [HTTP::header exist "Content-Type"] }  {
        if { [HTTP::header exist "Cookie"]  } { 
            CACHE::disable
            }
        CACHE::enable
        }        
}

when HTTP_RESPONSE priority 600 {

   if { [HTTP::status] == 200 }{
           if { [HTTP::header exist "Cookie"] } { 
            CACHE::disable
      }
      CACHE::enable
    }
}