CONNECTION TO INTERNET

I HAVE IN MY HOME PC TWO OPERATING SYSTEM VIZ WINDOW 98 AND WINDOWXP. I HAVE EARLIER CONFIGURED INTERNET SERVICES IN WINDOWXP. FOR SOME REASONS I WANTED TO CONFIGURE THE INTERNET SERVICE THRO WINDOW 98 ALSO. BUT IT IS NOT WORKING. WHENEVER I CONNECT TO THE NET IT RETURNS WITH A MESSAGE SAYING THAT IT IS DISCONNECTED BY OTHER DEVICES. I HAVE CHECKED THE CONNECTION OF INTRENAL MODEM AND THE DIRVER. THEY ARE WORKING. CAN MY CYBERMATES SUGGEST SOME ADVICE TO OVERCOME THIS PROBLEM. WITH THANKS AND REGARDS.