irule not working as expected

Cannot access a variable set in

RULE_INIT

CLIENT_ACCEPTED

Some other minor changes but think the following should work for you:

when CLIENT_ACCEPTED {
    set debug 1
}

when HTTP_REQUEST {
    if {$debug} {
        set LogString "Client [IP::client_addr]:[TCP::client_port] -> [HTTP::host][HTTP::uri]"
        log local0. "============================================="
        log local0. "$LogString (request)"
        foreach aHeader [HTTP::header names] {
            log local0. "$aHeader: [HTTP::header value $aHeader]"
        }
        log local0. "============================================="
    }

    switch -glob [HTTP::header "SOAPAction"] {
        "http://www.user.com/CustomerFacingWebsite/Customer" -
        "http://www.user.com/CustomerFacingWebsite/Points" -
        "http://www.user.com/CustomerInquiry/Balances" { 
            if { [active_members qa2-pool] > 0 } {
                pool qa2-pool
            } else {
                pool qa1-pool
            }
        }
    }
}