iRule to disable APM not working as expected

when HTTP_REQUEST {
set u [HTTP::header "User-Agent"]
set uru [HTTP::uri]

log local0.notice "user agent: $u and uri: $uru"

    if {[string tolower [HTTP::header "User-Agent"]] contains "mac os x" } {
            ACCESS::disable 

    }   
}

when CLIENT_ACCEPTED {
    ACCESS::restrict_irule_events disable
}

Doesnt work and ltm logging shows only:

    Apr  7 10:29:29 loadbalancerhostname.something notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : user agent: Mac OS X/10.10.2 (14C1514); ExchangeWebServices/5.0 (213); Mail/8.2 (2070.6) and uri: /EWS/exchange.asmx
Apr  7 10:29:29 loadbalancerhostname.something notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : user agent: Mac OS X/10.10.2 (14C1514); ExchangeWebServices/5.0 (213); Mail/8.2 (2070.6) and uri: /EWS/exchange.asmx
Apr  7 10:29:30 loadbalancerhostname.something notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : user agent: Mac OS X/10.10.2 (14C1514); ExchangeWebServices/5.0 (213); Mail/8.2 (2070.6) and uri: /EWS/exchange.asmx
Apr  7 10:29:30 loadbalancerhostname.something notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : user agent: Mac OS X/10.10.2 (14C1514); ExchangeWebServices/5.0 (213); Mail/8.2 (2070.6) and uri: /EWS/exchange.asmx
Apr  7 10:29:30 loadbalancerhostname.something notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : user agent: Mac OS X/10.10.2 (14C1514); ExchangeWebServices/5.0 (213); Mail/8.2 (2070.6) and uri: /EWS/exchange.asmx