Wendy,
When formatting the cRio it is good to connect through a switch or hub. During the process the system resets the port and this can cause some trouble getting everything started back. The switch will always be seen as active when the system reboots after a new format. That is one reason, among several, why the instructions say to never try to format the cRio over the wireless link.
The only place we use a cross over cable is from the camera to the cRio.
All other places will auto detect the connection and work if booted up after connected.
Here is a link with another description of the same issue.
http://www.chiefdelphi.com/forums/sh...1&postcount=14
-Hugh