[edong4273]

As hardcopi said, you should also try connecting to the RoboRIO via a ethernet cable or a USB cable (Note: Only the USB type-b connection (the square USB connector) works for connecting the RoboRIO to a driver station).
If all else fails, what I had to do when the RoboRIO on out practice bot wouldn't cooperate, a simple reformat of the RoboRIO usually does the trick.
Also, if possible, try to see if connections work on a separate computer that has the correct programs installed as well.