Pradeep Tyagi

Hi, everybody. I am a new member to this forum. I am not a computer savvy. Recently I have bought one PL-2303 USB-Serial Adapter cable & surfing net through that for past one month or so. But one fine morning when I tried to logged on, I got an error message No. 720 (No PPT control protocol configured). Since then I have tried so many combination but all are in vein. Now It is frustrating. Can anyone help me get rid of this problem. Regards Pradeep