Possible Duplicate:
How to set up reverse tethering over USB?
How do I connect and have internet access from my Samsung G II through my office PC network via USB?
Possible Duplicate:
How to set up reverse tethering over USB?
How do I connect and have internet access from my Samsung G II through my office PC network via USB?
The PDAnet app has always worked for me in getting internet over USB. The only difference between the free and paid versions is that paid supports https.
Even I had tried but didn't work for me. However, you can try this:
http://www.linuxreaders.com/2011/03/09/android-access-internet-from-computer-via-usb/
Another option is to set up your laptop as a wifi hotspot. This might help-
http://keithmac.com/?p=125
I have set up the same way at home without a wifi router. I have a wireless adapter on my desktop and set up an adhoc network and I can access my internet connection on my phone. But there's a catch. It might not work without rooting your phone.