iPhone 4S and internet connection via hotswap USB cable not working

Dear Experts

I have got iphone 4S I used to enable the Personal Hotswap and connect my laptop via USB cable to connect to the internet,,,,,,everything was working fine for a while.


Now I am not able to access the internet via USB cable any more although I tried different USB ports on my laptop ASUS U31S windows 7 ultimate.


http://i46.tinypic.com/2iiv2n9.png


Though still I can access the internet via Wi-Fi iphone Hotswap.


Could you please advise what troubleshooting should I consider to rectify this issue ?


Regards