No communication link

Ok I am trying to download program to Robot I keep getting an error saying there is no communication link available to VEX device. I downloaded the Windows 8 Prolific USB-to-Serial Driver thinking that might be the problem since I have windows 8 on my computer but it is still doing the same thing. Please help before I go crazy. I am using a usb to usb cable.
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For future reference, we are currently troubleshooting this particular issue on the ROBOTC forum post linked below.

http://www.robotc.net/forums/viewtopic.php?f=11&t=11572