EMSX Bloomberg problem with connection

hello try to connect to BLOOMBERG EMSX using

c = emsx('//blp/emapisvc')

function return this arguments: c =

emsx with properties:

      Session: [1x1 com.bloomberglp.blpapi.Session]
      Service: [1x1 com.bloomberglp.blpapi.impl.bc]
    Ipaddress: 'localhost'
         Port: 8194

then try to use this function

>> orders(c,{'EMSX_BROKER','EMSX_AMOUNT','EMSX_FILLED'})

ans =

     []

then try to use this function >> orders(c,{'EMSX_BROKER','EMSX_AMOUNT','EMSX_FILLED'},'useDefaultEventHandler',false) >> processEvent(c) SubscriptionFailure = {

    reason = {

        source = ""

        errorCode = -1

        category = "-1"

        description = "Could not find user's EMSX instance"

        subcategory = 

    }

    failureDetails[] = {

    }

}

here i see fail to connect to emsx.. where the problem??

[dmitriy]

>> orders(c,{'EMSX_BROKER','EMSX_AMOUNT','EMSX_FILLED'},'useDefaultEventHandler',false) >> processEvent(c) SubscriptionFailure = {

    reason = {

        source = ""

        errorCode = -5

        category = "-5"

        description = "User is not enabled for EMSX API"

        subcategory = 

    }

    failureDetails[] = {

    }

}