DUNS ERROR 733

733 - The PPP control protocol for this network protocol is not available on the server.

All versions of Windows - 

Installing Microsoft RRAS may disable 128-bit encryption. See this MS KB Article.

Windows NT & 2000 - TCP/IP protocol may not be correcting installed or bindings may be incorrect. See MS KB Article 168720.

Windows 2000 - This error may occur if the Negotiate multi-link option is enabled and you are dialing a normal one-call (single-link) connection. Solution: Start->Settings->Network & Dial-up Connections - right-click the connection, then Properties, Networking, Settings and clear the Negotiate multi-link for single link connections check box. See MSKB Article 244603.

Windows NT Server - See MSKB Article Q177648 and MSKB Article Q172956.

Also see:
MSKB Article Identifying 128-bit Windows 95 DUN Client
This Microsoft page will detect and recommend 128-bit encryption upgrade.

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