[Jack Gillespie]

Assuming you have a good link (Enet lights are lit and blinking), can you ping the controller at all?
...um, ok, will run up there again and ask the other teacher to do that (I'm the math side, he's the electronics side). But I don't have a clue what that means, personally.

Any reason you might have changed the IP address?
Nope, and there's only one IP that we can easily change (the laptop), which isn't the problem.

Have you read the instructions in the previous link or tried the network address changes?
Read the instructions, gave to jack (the other teacher) to read and make sure we had tried that, but I think the changing of the laptop isn't the problem - it's getting the cRio to respond, and we didn't see that happen when we changed the ip earlier.

But will try again after printing out this thread too, so jack can check that I have done the things you and the other thread suggested.

be back shortly! Fingers crossed....