Double-click the connection to try again. When you click OK , you quit the Msnt128.exe program. You can get a new 128-bit DUN Security Upgrade for Windows 98 Second Edition when Microsoft makes it available. The computer is not receiving a response from the modem. Check that the modem is plugged in, and if necessary, turn the modem off, and then turn it back on.
Communication port is invalid or busy.
This error message can occur if the modem is using a newly detected serial port installed by Windows 98 hardware detection. If this is the case, change the properties of the Dial-Up Networking connection to use the new modem settings. Programs run at StartUp from the StartUp folder can also cause this error message. In Msconfig click the Startup tab. For programs that may control your modem, click the program's check box to clear it.