Topic: I need help with a midi problem!

Hi! I'm having a problem with Midi. It has been working just fine with no problems. Now all of the sudden there's no midi input!? The input led doesn't come on (or output). And nothing is registering in Logic. I turned everything off, and checked all connections. All cables are in good shape. The midi cable is actually brand new. I know the midi driver is installed in the right place. It is found in the receipt files as RME midi.pkg just as it should be. There have a been a few times when I switched the midi cable from a rackmount synth to the FF800 with everything still on. I hope that's not part of the issue. I wouldn't want to damage anything. I just felt it shouldn't damage it, because it's not load carrying. Also, I was thinking about only turning the FF800 on "after" booting up my computer. I'm not sure if that makes a difference or not. It shouldn't, but I'd rather play it safe. Any help that can be provided would be much appreciated! Thanks!