1. fix error from line 84:
   current implementation:
   addError( "CreateMonitoredItems(): status '" + uaStatus, uaStatus );

possible implementation for fix:
addError( "CreateMonitoredItems(): status '" + subscription.ServiceResult, subscription.ServiceResult );

2. skip script if server does not support the CreateSubscription service:
   current implementation, line 63:
   // Create subscription for this test
   subscription = new Subscription();
   CreateSubscriptionHelper.Execute( {
   Subscription: subscription
   } );

possible implementation for fix:
// Create subscription for this test
subscription = new Subscription();
if( CreateSubscriptionHelper.Execute( {
Subscription: subscription
} ) == false )
{
return( false );
}