I am using Micromax 300c EVDO modem ( Datacard ) for wireless broadband connection. 1. In one machine having Intel 915 Chipset motherboard, it is working fine. In the device manager, in the modem category, it shows correctly as " CDMA 2000 Rev A Modem ". 2. In another machine, having Intel DG41TY motherboard, the device manager does not show modem. Only in other devices category, shows as Data services. ( in ports category both diagnostic and service ports are shown correctly ) Both systems have Windows 7 ( 32bit ). Any solutions will be appreciated.