Irule strange problem

when CLIENT_ACCEPTED {
    Save the VS default pool name
   set default_pool [LB::server pool]
}
when HTTP_REQUEST {
   switch [string tolower [HTTP::host]] {
      "aaa.co.uk" { HTTP::respond 301 Location "http://www.aaa.co.uk[HTTP::path]" }
      "www.aaa.co.uk" { pool pl_it_www-aaa-co-uk_p80 }
      "www.aaa.com" { pool pl_it_www-aaa-com_p80 }
      "bbb.com" { HTTP::respond 301 Location "http://www.bbb.com[HTTP::path]" }
      "www.bbb.com" {
         switch -glob [HTTP::path] {
            "*/qqq*" { HTTP::respond 301 Location "http://www.bbb.com" }
            "*/default.html" { HTTP::respond 301 Location "http://www.bbb.com" }
            default { pool pl_it_www-bbb-com_p80 }
         }
      }
      default {
         pool $default_pool
      }
   }
}