Verify Your User Name and Password1. Make sure that the CAPS LOCK key has not been accidentally pressed and engaged.2. ClickStart, point toConnect To, and then click your dial-up connection.3. In theConnectdialog box, verify that your user name and password are correctly typed in theUser nameandPasswordboxes as provided by your ISP, and then clickDial.NOTE: If you are not sure what your user name and password are, contact your ISP for assistance.Verify the Phone NumberVerify that you are using the correct phone number to connect to your ISP.Allow Unsecured PasswordConfigure your dial-up connection to your ISP to allow an unsecured password. To do this, follow these steps:1. ClickStart, clickControl Panel, clickNetwork and Internet Connections, and then clickNetwork Connections.2. Click your dial-up connection, and then clickChange settings of this connectionunderNetwork Tasks.3. Click theSecuritytab, and then verify thatTypical (recommended settings)is selected.4. In theValidate my identity as followsbox, verify thatAllow unsecured passwordis selected.5. Click theOptionstab.6. Click to clear theInclude Windows logon domaincheck box (if it is selected), and then clickOKtwice.Lower the Connection SpeedIf phone-line noise or other interference is an issue, you may be able to connect to your ISP by lowering your connection speed. To lower your connection speed, follow these steps:1. ClickStart, clickControl Panel, clickNetwork and Internet Connections, and then clickNetwork Connections.2. Click your dial-up connection, and then clickChange settings of this connectionunderNetwork Tasks.3. Click theGeneraltab, click your modem in theConnect Usingbox, and then clickConfigure.4. In theMaximum speed (bps)box, click9600, and then clickOKtwice.If you are able to connect at a lower speed, or if phone-line noise is such that you cannot connect, request that the phone company check the phone lines.Disable Hardware Flow ControlDisable the Hardware Flow Control feature in your dial-up connection to your ISP. To do this, follow these steps:1. ClickStart, clickControl Panel, clickNetwork and Internet Connections, and then clickNetwork Connections.2. Click your dial-up connection, and then clickChange settings of this connectionunderNetwork Tasks.3. Click theGeneraltab, click your modem in theConnect Usingbox, and then clickConfigure.4. Click to clear theEnable Hardware Flow Controlcheck box, and then clickOKtwice.Disable Modem Error ControlDisable the Modem Error Control feature in your dial-up connection to your ISP. To do this, follow these steps:1. ClickStart, clickControl Panel, clickNetwork and Internet Connections, and then clickNetwork Connections.2. Click your dial-up connection, and then clickChange settings of this connectionunderNetwork Tasks.3. Click theGeneraltab, click your modem in theConnect Usingbox, and then clickConfigure.4. Click to clear theEnable Modem Error Controlcheck box, and then clickOKtwice.Disable Modem CompressionDisable the Modem Compression feature in your dial-up connection to your ISP. To do this, follow these steps:1. ClickStart, clickControl Panel, clickNetwork and Internet Connections, and then clickNetwork Connections.2. Click your dial-up connection, and then clickChange settings of this connectionunderNetwork Tasks.3. Click theGeneraltab, click your modem in theConnect Usingbox, and then clickConfigure.4. Click to clear theEnable Modem Compressioncheck box, and then clickOKtwice.Disable Software CompressionDisable the Software Compression feature in your dial-up connection to your ISP. To do this, follow these steps:1. ClickStart, clickControl Panel, clickPrinters and Other Hardware, and then clickPhone and Modem Options.2. On theModemstab, click the modem that you want to configure.3. ClickProperties.4. Click theAdvancedtab.5. ClickChange Default Preferences.6. InData Connection Preferences, clickDisabledin theCompressionlist.Disable LCP ExtensionsYou may have trouble connecting to your ISP if your ISP's Point-to-Point Protocol (PPP) server does not support Link Control Protocol (LCP) extensions. LCP extensions include a Callback option, a Time Remaining feature, and Identification packets as defined in RFC 1570. Contact your ISP to determine whether you should disable LCP extensions.

To disable LCP extensions, follow these steps:1. ClickStart, clickControl Panel, clickNetwork and Internet Connections, and then clickNetwork Connections.2. Click your dial-up connection, and then clickChange settings of this connectionunderNetwork Tasks.3. On theNetworkingtab, clickSettings, and then click to clear theEnable LCP extensionscheck box.Disable IP Header CompressionYou may experience issues logging on to your ISP if you are using IP header compression (also known as Van Jacobson, or VJ, header compression). To disable IP header compression, follow these steps:1. ClickStart, clickControl Panel, clickNetwork and Internet Connections, and then clickNetwork Connections.2. Click your dial-up connection, and then clickChange settings of this connectionunderNetwork Tasks.3. On theNetworkingtab, clickInternet Protocol (TCP/IP), and then clickProperties.4. ClickAdvanced, and then click to clear theUse IP header compressioncheck box.5. ClickOK.No Message for User Name and PasswordIf you do not receive a message for your user name or password when you attempt to connect to your ISP, follow these steps:1. ClickStart, clickControl Panel, clickNetwork and Internet Connections, and then clickNetwork Connections.2. Click your dial-up connection, and then clickChange settings of this connectionunderNetwork Tasks.3. Click theGeneraltab, click your modem in theConnect Usingbox, and then clickConfigure.4. Click theOptionstab, click to select thePrompt for name and password, certificate, etc.check box, and then clickOK.Mutual AuthenticationYou may experience issues logging on to your ISP if your ISP's PPP server is using mutual authentication. Dial-Up Networking does not support mutual authentication. Contact your ISP to determine whether your ISP's PPP server uses mutual authentication. For additional information about modem or dialing problems, click the article numbers below to view the articles in the Microsoft Knowledge Base: