there is no problem with isp account b'cos its working fine on my friend's system.yes it showed errors like noise on phone line . maybe this error might have caused problem.
i have spare hard disk which has win98 and tried it. but problem worsens.
this time error is ' logging on to the network' .. ..after 10-15 seconds message shows 'xxxx disconnected' without even getting connected.
i usually connect to isp at night times. so, there will not be noisy , busy lines
and i have not changed call waiting status.
thanks for ur reply