Need help with iRule based on host and path

Finally, problem solved! The reason was the order of execution for the 2 scripts. I donot really understand why this happens but when I placed the script in second place, everything is executed as expected. If you have any ideas please let me know.

The problematic order which doesnot work is shown below:

First script:

when HTTP_REQUEST {
  if { [HTTP::host] equals "hostname_a"} {
    if { [HTTP::path] equals "/path" } {

      pool pool_a
        log local0. "URL : [HTTP::host][HTTP::uri] entered"
    }
  }
  if { [HTTP::host] equals "hostname_b"} {
    if { [HTTP::path] equals "/path" } {

        pool pool_b
        log local0. "URL : [HTTP::host][HTTP::uri] entered"
    }
  } 
}

Second script:

when HTTP_REQUEST {
if {[HTTP::has_responded]}{return}
    switch -glob [string tolower [HTTP::path]]
    {

....

....

    }

    default
    {
            switch [string tolower [HTTP::host]]
            {

                 "hostname_a"

                 {

                   pool pool_c
                   persist none

                  }

....

.....

                  default

                   {

                         pool_z

                   }

......

Anyway, thank you all very much for your time.