It works now! But I think that it is a bug that I need start WSUS service every time when workstation has a problem with updates detect.
because when i try to stop WSUS service from console I recieve an error that service is not running. Then I start service, go to test workstation and checking for new updates. And after this manipulations Windows Update successfuly detect new updates
because when i try to stop WSUS service from console I recieve an error that service is not running. Then I start service, go to test workstation and checking for new updates. And after this manipulations Windows Update successfuly detect new updates