Error in connecting my dial-up

As part of my telephone service, I'm using dial-up connection in order to connect to the Internet. When I try dialing the connection, I received this error as shown above. I already tried restarting my computer and connect my dial-up but still, the same error appears. It worked fine last week.
What must be the problem? What should be done for me to connect my dial-up?
Error Connecting to connection to 19004080000
Registering your computer on the network…
Error 720: The connection attempt failed because your computer and the remote computer could not agree on PPP control protocols.
