ESs modem

well, this is a trange problem. Recently, I installed win98a in my system... everything was ok, but there was a trange problem with the modem. First, when it called to ny server, it keep telling me connecting.., just that, even when the strange sound stopped. After that, I
asked to a friend to lent me his modem. Everything was ok, but when I change it to the old modem, now I have another problem,when I try to connect, there is a strange sound comming ftom the modem, and then there is an error telling me that the phone line wasn`t plug in, even when it was.
Please, if someone know something about this, please send me a reply.

Thanks

Benjamin Brunet