Hi, thank you all for your responses... my phone is LG LSP 350R. Today I borrowed another phone from my friend which is a LG LSP 110R and i installed that in my system and its working perfectly but still i am not able to install my LG LSP 350R... I even downloaded the driver from the reliance website.... my USB port is working fine since I have my sony handycam and the newly connected LG 110 USB connected through the same port... so the problem must be with the driver... I called up LG tech support and they said since I am not using a LG cable that must be the problem.. I am using a third party cable but I think that is not the problem since the LG 110 which I am using now is also a third party cable... the problem must be with my system as it is not uninstalling the LG modem completely.. when i go to add remove programs and try to remove the LG modem it does not go away completely... there must me some way to remove it manually...