Dell desktop computer with vista and aol dial up///...aol worked (dial up---only option at location), then just stop'd working... checked line, did re-install of aol, tried both another internal modem and a usb modem... the unit dials, but does not connect and continues to give this error (and i've changed access #'s too). any idea's on how to fix.... owner of bus. has been out of com. for over 2 wks....?????