Use WebSockets in plugin

Hello.
I want use WebSockets in my plugin.
First, I declare:

import Qt.WebSockets 1.0

After that, when I trying to run code, I get:

creating component failed
line 9: plugin cannot be loaded for module "Qt.WebSockets": Cannot load library C:/Programs/MuseScore 2/qml/Qt/WebSockets/declarative_qmlwebsockets.dll: Не найден указанный модуль. (Module not found)

--
I'm download Qt5WebSockets.dll and put in C:\Programs\MuseScore 2\bin
And error changed

creating component failed
line 9: plugin cannot be loaded for module "Qt.WebSockets": Cannot load library C:/Programs/MuseScore 2/qml/Qt/WebSockets/declarative_qmlwebsockets.dll: Не найдена указанная процедура. (Procedure not found)