To solve dsl internet connection issues, you need to disable the turn off option in Windows XP which is usually what causes the internet to go off. Start by clicking on the start button and going to System properties. Click on the hardware tab and press the device manager button. Expand the USB controllers and double click on the USB Root Hub. Select the Power Management tab and untick the "allow the computer to turn off the device to save power" button. This disables the function and your internet should be back.