USB modem. My USB modem(Pen drive) is not working. I am using a USB of 4 GB. In my lap top if I

Question

My USB modem(Pen drive) is not working. I am using a USB of 4 GB. In my lap top if I put the Drive there will be no response. I can see the one blinking light after few minutes of insertion and there after once in a while it is blinking. It was happened after due to an attempt to convert a WMPInfo (n) file of xml, a powerpoint presention from another system,and that was originally taken from the net. I cann't find out the H:/ drive. Please give th solution. Thanks.