catch fault exeption on UpgradeTools_Task

hi all,

I'm trying to automate update/install of vmware tool in virtual machine but this simple test code aren't work.

I can see error in VSphere console but i can't handle fault

    $vm_view->UpgradeTools_Task ;

   } ;

  if ( $@ ) {

    print "erreur\n" ;

    $@->faultMessage() ;

    print Dumper $@ ;

  }