Upgrade Win98-Use AOL-Modem doesn’t work

After an upgrade to Win 98 was made on a computer that uses AOL, the modem doesn’t work. The following message is received in modem properties/diagnostics: The modem failed to respond. Make sure it is properly connected and turned on. If it is an internal modem or is connected, verify that the interupt for the port is properly set. According to HP documentation that came with computer, the Com Port should be 2, but the modem shows Com Port 1, and I do not know how to change it.