Usb not working

In over qpqlpc2148 board p0.23 is open and not conected to vcc and gnd. So i make this pin high by setting p0.23 using IO0SET |=0x00800000. When connected to pc it shows same error msg that is One of the device malfuctioning windows.along with it shows some msg new hardware found,unknown device. Then i unplug the cable and once again pc it shows device ready to use and again and again shows same error msg.and i also sean the dvice property using device manager vid and pid 0000 and enumaration type usb device type unknown. Im totaly confused whether it is software or hardware problem