Something to read...
1) If you are using a laptop on a docking station, remove the BlackBerry
from the docking station port and connect it directly to the computer.
2) If you are using a USB hub or any external connection point, remove the
BlackBerry and connect it directly to the computer.
3) If you are running Windows XP, disable Power Management in device
a) Right-click on My Computer and choose Properties. On the next window
click on the Hardware tab and click on the Device Manager button.
b) From the Device Manager scroll to the bottom to Universal Serial Bus
Controllers and expand the group. Double-click the first USB Root Hub and
click on the Power Management tab. Uncheck the box 'Turn off this device to
save power' and click Ok. Repeat this step for any other USB Root Hubs