Hello.
Please install "LGUnitedMobileDriver_S497CA20_WHQL_ML_Ver_1.0 " driver from the driver package "http://octopusbox.com/files/drivers/LGUnitedModemDriver_WHQL_ML_Ver_4.9.7_All_Win7_LGE All.zip". Also please install this driver:
http://octopusbox.com/files/drivers/...0_All_Win7.exe.