I have a nokia mobile and windows7 PC. And I used 'Nokia PC Suite' to connect my mobile (via bluetooth) to PC inorder to use it as a modem. I was successfully connected to internet by this method. But today it shows 'FAILED to establish internet connection'. Why is it shows like this?. Bluetooth of both PC and mobile are working well. Also I can use internet on mobile. And I am 100% sure that there is no viruses infected my computer.